Nomi invariabili

Invariable nouns

In Italian, there are two types of invariable nouns: invariable by gender and invariable by number. When we say “by number,” we mean that they have the same form whether they are singular or plural.

Here are some examples:

Masculine nouns that end in -a:

• il sosia (i sosia), la sosia (le sosia) look-alike

Feminine nouns that end in -o:

• l’eco (f.) echo