Adjective: brave, courageous, valiant.
It appears here as the title of a children’s book, Rohkea perhonen (”Brave Butterfly”).
A related word is the verb rohjeta, which means ”to dare,” ”to venture” or ”to have the nerve.”Rohjeta is one of the rare type 6 Finnish verbs that ends in -eta/-etä. Type 6 verbs always have a meaning having to do with ”becoming something”, implying a change from one state to another. See rohjeta conjugated here.