The full table
Pick the article from the noun’s gender, number and first sound.
| m · most nouns | il libro → i libri |
| m · s + consonant, z, gn, ps | lo zaino → gli zaini |
| m · vowel | l’amico → gli amici |
| f · most nouns | la casa → le case |
| f · vowel | l’amica → le amiche |
Feminine nouns never take lo: la studentessa, la zia.
Words ending in -e can be either gender: il pane, la chiave. Learn them with their article.