Grammar / Gender
In Greek there are three grammatical genders: masculine, feminine, and neuter. All nouns belong to one of these three genders and will have different endings according to their gender. Grammatical gender is often arbitrary and unrelated to biological sex.
Masculine
Masculine gender is typically used for males and also arbitrarily for other non-animate nouns.
Feminine
Feminine gender is typically used for females and also arbitarily for other non-animate nouns.
Neuter
Any noun that is not masculine or feminine is neuter.