In Latin est is singular. est plural is sunt
(Tu) est magister [male]/magistra [female].
Criteria is plural. Criterion is singular. Don't mess with Latin!
"You are" would be "es", if it is singular, or "estis", if it is plural.
A "Pilus" is the Latin for a hair, so following the Latin rules for plurals, the plural is "pili".
Alumna is a Latin word. (It is the feminine form of alumnus, plural alumni).And the feminine Latin plural of alumna is alumnae.
Tu (singular) Vos (plural)
The word "dicta" is a Latin plural. The singular is dictum.
Senex is singular in Latin and it means "old man" or "elder." The plural form is senes.
The word fungi is a plural noun.The singular noun is fungus.This is a Latin plural more commonly used than the English plural which would be funguses.
Tu (singular). Vos (plural).
Noli! (singular) Nolite! (plural)
Tu. (singular) Vos. (plural)