When the name (noun) is required to denote more than one of the persons
or things for which it stands, "j" is added to it, as "rozoj", roses;
"kolomboj", pigeons; and then every "describing" word (adjective) which
belongs to it must also have "j", as "rugxaj rozoj", red roses; "la
kolomboj estas belaj", the pigeons are beautiful.
(When the noun stands for "more than one," it is said to be PLURAL. "j"
is the sign of the plural).