Italian Altrui: How to Say “Someone Else’s” in One Elegant Word (B2)

Walk past a Catania apartment building and you might see a small sign by the entrance: rispetta il riposo altrui. Open an Italian newspaper and you find a headline about l’appropriazione di idee altrui. Read Manzoni and the word floats up again and again, in moments when characters worry about other people’s property, other people’s reputations, other people’s pain. That single word, doing all this work, is italian altrui.

This guide takes italian altrui from courtroom to dinner table. You will learn what it actually means, why it never changes form, where it sits in a sentence, and the one question every learner asks sooner or later: when can I drop it in conversation without sounding like a notary reading a will?

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Italian altrui in one line

Imagine an Italian friend telling you about a colleague who keeps reading the office mail of the rest of the team. In English they might say “he’s always reading other people’s emails”. In Italian they have a choice: legge sempre le email degli altri (everyday) or legge sempre la corrispondenza altrui (the version that ends up in the company disciplinary report).

Italian altrui means “of others”, “of other people”, “someone else’s”. It is a single invariable word that replaces the longer phrase degli altri or di qualcun altro. Same meaning, higher register, fewer syllables.

• Non giudicare le scelte altrui. (Don’t judge other people’s choices.)
• Rispetto la libertà altrui. (I respect other people’s freedom.)
• Leggere la corrispondenza altrui è reato. (Reading someone else’s mail is a crime.)

Why it never changes form

The first thing that surprises learners is that altrui refuses to bend. Most Italian adjectives have four endings (rosso, rossa, rossi, rosse); possessives have at least two (mio, mia, miei, mie). Altrui has one. The word entered modern Italian as a fossil from medieval times, frozen in shape, and never picked up the agreement habit.

The practical consequence: whether you talk about one woman’s idea or many men’s ideas, the form on the page stays the same. No masculine, no feminine, no singular, no plural to track.

• l’opinione altrui (one person’s opinion) / le opinioni altrui (other people’s opinions)
• il libro altrui (someone else’s book) / i libri altrui (other people’s books)
• la casa altrui (someone else’s house) / le case altrui (other people’s houses)

Compare with degli altri, which requires the article to match (delle, dei, dell’). With altrui you skip all that. One word, zero endings to remember. For a writer, this concision is precisely the appeal.

Where altrui sits in the sentence

Open a contract, a moral essay, or a newspaper editorial. You will almost always see altrui in the same spot: right after the noun. La roba altrui, le opinioni altrui, i diritti altrui. This is the default position and the one you should reach for every time you write the word.

You can also place it before the noun: l’altrui opinione, l’altrui sofferenza, l’altrui ricchezza. The meaning does not change, but the register climbs another step. Pre-nominal altrui lives in poetry, philosophy, nineteenth-century novels, and old legal prose. If you are not writing one of those, stick to the post-nominal position.

Altrui vs degli altri: same meaning, different rooms

Picture two friends in a Lecce kitchen complaining about a third one who never minds her business. They would never say «si fa i fatti altrui». They would say «si fa sempre i fatti degli altri». The second is the natural choice for spoken Italian. The first sounds like the friend opened a law textbook between sentences.

The two forms mean exactly the same thing. They live in different rooms of the language. Degli altri is the everyday workhorse: friends, family, casual emails, voice notes. Altrui is the dressed-up cousin who turns up in essays, contracts, sermons, philosophy class, and one famous commandment.

Context	Natural choice	Why
Chatting with friends	la macchina degli altri	altrui sounds stiff
Legal contract	beni altrui	register matches the genre
Newspaper headline	opinioni altrui	concise, elegant in print
Philosophy essay	la sofferenza altrui	standard academic style
Text message	le idee degli altri	altrui would feel odd

A safe rule for italian altrui: when speaking, default to degli altri. When writing something a stranger will read, italian altrui becomes a real option. When writing a law, a thesis, or a love letter pretending to channel Petrarca, altrui is almost expected.

L’altrui as a noun

The Ten Commandments translated into Italian include the line non desiderare l’altrui. No noun follows. The article and the word stand alone, meaning “what belongs to others”. This is the pronominal form, and it is the most literary face of the word.

You will meet l’altrui almost only in old prose, philosophy, and the kind of writing that wants to sound classical on purpose. In modern conversation it has practically vanished. People say la roba degli altri, le cose altrui, quello che è di altre persone. Recognise l’altrui when you read it, file it under “high literary”, and do not imitate it unless you are writing a sermon.

• Non desiderare l’altrui. (Do not covet what belongs to others.)
• Vive dell’altrui. (He lives off other people’s stuff.)
• Si è impossessato dell’altrui senza vergogna. (He took what belonged to others without shame.)

Three places you will actually meet altrui

Knowing a word matters less than knowing where it lives. Altrui has three natural habitats, and once you spot them you start seeing the word everywhere.

1. Legal Italian

Italian contracts and the criminal code lean heavily on altrui. Cosa altrui, beni altrui, diritti altrui, denaro altrui. Legal writing wants precision and brevity, and the word delivers both at once. A lawyer in Catania defending a corporate client will use altrui three times before the first coffee break.

• impossessarsi di beni altrui (to take possession of someone else’s property)
• l’appropriazione indebita di denaro altrui (misappropriation of someone else’s money)
• la violazione del domicilio altrui (trespass on another person’s home)

2. Ethics and philosophy

When Italian writers talk about empathy, moral duty, or the relation with other people, altrui is the word that does the abstract work. Primo Levi reaches for it when he writes about la dignità altrui. A philosophy student in Padova taking notes on Levinas will write l’etica altrui. The word allows a clean, general statement without naming any specific person.

• la sofferenza altrui (the suffering of others)
• l’altrui dignità (the dignity of others)
• non turbarsi per le opinioni altrui (not to be troubled by other people’s opinions)

3. Proverbs, commandments, public signs

The Italian Ten Commandments use altrui: non desiderare la donna altrui, non desiderare la roba altrui. Polite public signs use it too: rispetta il riposo altrui in apartment buildings, rispetto della proprietà altrui in parks. Italian moralising naturally reaches for this word because it sounds clean and impersonal.

Idioms and proverbs

A handful of fixed expressions keep altrui alive in the modern ear, even for Italians who never open a law book. Learn these six and you will spot the word instantly in any text or conversation.

• vivere alle spalle altrui (to live off other people)
• farsi i fatti altrui (to mind other people’s business)
• non desiderare la roba altrui (do not covet other people’s stuff, the commandment)
• parlare male alle spalle altrui (to badmouth people behind their back)
• godere delle disgrazie altrui (to take pleasure in other people’s misfortune)
• rispetto della proprietà altrui (respect for other people’s property)

Look at the list again. Almost every idiom describes a slightly negative behaviour: gossip, envy, intrusion, freeloading. This is not an accident. Altrui has a faint moralising aura, which is why it fits commandments, proverbs, and slightly disapproving conversation so well.

Common mistakes with altrui

Three predictable errors show up when learners discover altrui. None are catastrophic, but each one flags a writer who has memorised the word without absorbing its social weight. Each takes about thirty seconds to unlearn.

Trying to inflect it. Learners from French, Spanish, or German often try to make altrui agree with the noun. They produce altrue, altrua, or strange plurals. There is one form. Le opinioni altrui, never le opinioni altrue.

Doubling the possessive. Writing il mio libro altrui is incoherent. A book cannot be both yours and someone else’s at the same time. If you mean “one of the others’ books in my collection”, you write uno dei libri altrui nella mia biblioteca, with uno dei doing the partitive work.

Using it casually. Drop altrui into a WhatsApp message and Italians will smile, repeat your sentence with degli altri, and move on. The grammar is fine, the register is wrong. The mistake is not the word, it is the room you chose for it. A useful test: would the same sentence sound natural in a contract or a newspaper editorial? If yes, altrui fits. If you can only picture it on a kitchen table with friends, switch to degli altri.

One smaller mistake worth flagging: putting altrui with food or drink. Il caffè altrui exists technically but sounds odd, because food belongs to the domestic register where altrui is out of place. Italians say il caffè di qualcun altro instead. The rule of thumb: the smaller and more everyday the object, the worse altrui fits. Rights, freedoms, ideas, property, suffering, opinions: altrui fits naturally. Coffee, sandwich, keys, scarf, phone charger: altrui sounds wrong, even though grammatically nothing forbids it.

Altrui vs proprio: the moral pair

Italian has another possessive that loves to keep altrui company: proprio, meaning “one’s own”. The two are opposites, and Italian writers like to set them against each other to build moral statements. Open any newspaper editorial about ethics or freedom and you will find the pair within three paragraphs.

• antepone il proprio interesse a quello altrui. (He puts his own interest before that of others.)
• la propria libertà finisce dove inizia la libertà altrui. (One’s own freedom ends where the freedom of others begins.)
• difendere i propri diritti senza calpestare i diritti altrui. (Defend your own rights without trampling on others’ rights.)

Three differences to keep in mind. Proprio inflects (proprio, propria, propri, proprie); altrui never does. Proprio can sit before or after the noun with equal ease; altrui wants the post-nominal slot. Proprio works in casual conversation; altrui in casual conversation still sounds slightly bookish.

How to pronounce altrui

Three syllables: al-TRU-i. The stress falls on the second syllable, on the u, which is pronounced as a clean “oo” like in English “boot”. The final i is a separate syllable, not a glide. You give it its own small beat at the end, not the diphthong English ears want to make of it.

English speakers tend to make two mistakes. They pronounce the au- as in English “auto”, flattening it into a single vowel. In Italian, a and l stay separate: AHL, not AWL. And they swallow the final i, turning a three-syllable word into a two-syllable one. Practice with la libertà alTRUi, i diritti alTRUi, la roba alTRUi, keeping the u long and the final i audible.

Italian altrui at a glance

Question	Answer
What does it mean?	other people’s, someone else’s, of others
Does it change?	No. Invariable.
Where in the sentence?	Usually after the noun: la roba altrui
Casual equivalent?	degli altri / di qualcun altro
Pronominal form?	l’altrui, very literary
Register?	Formal, written, legal, philosophical
Pronunciation?	al-TRU-i, stress on second syllable, three beats
Common idioms?	vivere alle spalle altrui, farsi i fatti altrui

Dialogue at a law office in Catania

Federica is a lawyer in Catania. Her client Niccolò has come in to discuss an unfair competition case. Notice how naturally italian altrui appears in her speech: this is its natural habitat. Niccolò is not a lawyer, so he keeps asking what the word means.

Three things to notice. Federica uses altrui three times, always in legal formulas (informazioni altrui, beni altrui, proprietà altrui). Niccolò asks for translation because the word lives outside his everyday vocabulary. Federica herself recommends degli altri for family conversation. That gap between legal Italian and kitchen Italian is the whole lesson of this article.

FAQ on italian altrui

Six honest questions B2 learners ask when they first meet italian altrui. Short answers, no detours.

Related guides

If italian altrui caught your interest, three neighbouring guides round out the picture. Start with Italian possession with di for the everyday way to say “Marco’s car” without an apostrophe: it is the baseline construction that altrui sits above on the register ladder. Then read why Italians don’t say “my” with body parts, where the language drops possessives entirely in favour of indirect object pronouns: same instinct as altrui, which prefers concision over agreement. Finally, see the Italian hanging theme, a C1 structure that lives in the same literary register as pre-nominal italian altrui.

For the dictionary angle, the Treccani entry on altrui is the most reliable single reference, and the Treccani page on possessive adjectives gives the wider picture. Both are written for native speakers but a B2 reader can follow them comfortably.