irregular italian nouns 2: feminine nouns that end in -o

There are far fewer feminine nouns ending in -o than masculine ones in -a, but these really common ones are worth knowing:

l'auto
la foto
la radio
la moto (motorcycle)
la mano (hand)

All are invariable in the plural. La radio, le radio. La foto, le foto.

The exception is la mano, which becomes le mani in the plural. Ciao for now!