plural. In English we usually form the plural by adding _-s_ or _-es_ to
the singular. So Latin changes the singular to the plural by changing
the ending of the word. Compare

«Naut-a pugnat»
_The sailor fights_
«Naut-ae pugnant»
_The sailors fight_

«25.» RULE. _Nouns that end in «-a» in the singular end in «-ae» in the
plural_.

«26.» Learn the following nouns so that you can give the English for the
Latin or the Latin for the English. Write the plural of each.

«agri´cola», _farmer_ (agriculture)[1]
«aqua», _water_ (aquarium)
«causa», _cause, reason_
«do´mina», _lady of the house, mistress_ (dominate)
«filia», _daughter_ (filial)
«fortū´na», _fortune_
«fuga», _flight_ (fugitive)
«iniū´ria», _wrong, injury_
«lūna», _moon_ (lunar)
«nauta», _sailor_ (nautical)
«puel´la», _girl_
«silva», forest (silvan)
«terra», _land_ (terrace)

[Footnote 1: The words in parentheses are English words related to