How to Say "Seventeen" in Italian

diciassette

/di.t͡ʃasˈsɛt.te/

Seventeen in Italian is diciassette.

The word diciassette is a cardinal number.

Meaning: cardinal number (num)

What does it mean word for word?

The word is a compound of dieci (ten) and sette (seven).

The number diciassette is invariable, meaning it does not change its form based on gender or number.

The word has 4 syllables and the stress is on the 3rd syllable: /di.tʃasˈsɛt.te/.

The Italian word diciassette comes from the Latin phrase decem ac septem, which literally means 'ten and seven'.
The double 't' in diciassette is not just a spelling rule but requires a distinct pause in pronunciation called a 'geminate consonant', which is essential for sounding native.
Unlike the word for 'one', which changes based on whether you are counting men or women, diciassette is an unchanging 'island' that ignores gender entirely.

Lei ha diciassette anni.
She is aged seventeen.
This sentence is useful for expressing someone's age using diciassette.
Tatoeba #5030708 by Guybrush88, translation #310075 by CM
Helen ha diciassette anni.
Helen is seventeen years old.
This sentence is useful for expressing Helen's age using diciassette.
Tatoeba #378709 by Pharamp, translation #33851 by CN
Si sposò a diciassette anni.
She got married at seventeen.
This sentence is useful for describing the age at which someone got married using diciassette.
Tatoeba #1418248 by Guybrush88, translation #1418183 by Dejo
La presentazione si compone di diciassette slide.
The presentation consists of seventeen slides.
35 more sentences on Tatoeba

Sofia and Matteo are counting books in a shop.

Sources

Wiktionary, “seventeen” translations and entries diciassette, CC BY-SA 4.0, dump of 2026-09-26.
Word origins: Wiktionary entries diciassette, CC BY-SA 4.0.
Example sentences: Tatoeba CC BY 2.0 FR.

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