Do you mean pronouns? Like "her" and "they" in English?
If so, it is very contextual. In Latin, when speaking aout someone else in a 'her' or 'they' reference, you simply add a suffix to the name. The suffixes are=
she (singular)= ea, eius (Gen.), ei(Dat.), eam (Acc.), ea (Abl.)
she (plural)= eae, eorum (Gen.), eis(Dat.), eas (Acc.), eis (Abl.)
For example, if you wanted to say "I saw her", 'she' is singular and in the accusative case and so you would use the suffix 'eam', therefore in Latin the statement would be "ego [name]eam spectat"... ('ego' meaning 'i' and 'spectat' meaning 'saw'). If you wanted to say "I saw them" with 'them' reffering to women, instead of writing 'they' in latin, you would write the plural version of the word 'woman', which would be "famineae". Thus, "ego femineae spectat".
Alumna is a Latin word. (It is the feminine form of alumnus, plural alumni).And the feminine Latin plural of alumna is alumnae.
ara (singular), arae(plural), feminine
Most/very well known, recognized (feminine genitive singular or feminine nominative plural).
The Latin word for 'roots' is the noun radices. The noun is feminine gender, in the plural form. The singular form is 'radix'.
The word 'free' is an adjective in English and in Latin. Latin gives feminine, masculine or neuter gender to its nouns. Adjectives must agree in gender with the nouns or pronouns that they modify. Therefore, the adjective 'free' takes three forms in the singular, and three forms in the plural. In the masculine, the adjective is liber in the singular, and liberi in the plural. In the feminine, it's libera in the singgular, and liberae in the plural. In the neuter, it's liberum in the singular, and libera in the plural.
In Latin est is singular. est plural is sunt
Soli is the Latin plural of 'solus'. The Latin adjective is in the masculine singular form. The feminine and neuter are 'sola' and 'solum', respectively. No matter the gender, the adjective means 'alone, only'.
Wild = Sævus if the subject is masculine, Sæva if Feminine and Sævum if neuter. all this for the singular for the plural: Sævi Sævæ Sæva, again masculine feminine neuter.
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".
Tu (singular) Vos (plural)