What is the plural form of the Italian word 'vecchio'?

The prior answer was completely incorrect. In Italian as in many languages, adjectives have both a singular and plural form as well as a masculine and feminine form.

vecchio - old

Masculine Singular: vecchio

Feminine Singular: vecchia

Masculine Plural: vecchi

Feminine Plural: vecchie

Usage:

"The man is old." - "L'uomo è vecchio."

"The woman is old." - "La Donna è vecchia."

"The men are old." - "Gli uomini sono vecchi."

"The women are old." - "I donne sono vecchie."