Gender
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All nouns in Italian are either masculine or feminine.
In most cases, nouns ending in a are feminine and nouns ending in o are masculine.
- la finestra (the window)
- il portello (the door)
Nouns ending in e may be either masculine or feminine - so with those you just have to remember which is what!
- il cane (the dog)
- la chiave (the key)
If there is an adjective describing a noun, that has to change to agree with the gender of the noun it is describing.
- la finestra rotonda (the round window)
- il portello aperto (the open door)
- la chiave arrugginita (the rusty key)
- il cane vizioso (the vicious dog)