εὐφρανθῶμεν, [7 verses] (verb 1st pl aor subj pass) "Be merry" is euphraino, which means "cheer", "gladden", and in the passive, "make merry", "enjoy oneself". -- The Greek verb translated as  "be merry" means "cheer", "gladden", and in the passive, "make merry" and "enjoy oneself". It is used only in parables by Luke, most commonly in the parable of the prodigal son.