嬉嬉[kiki] gleeful
嬉しい[ureshii] happy
嬉しがる[ureshigaru] to be glad
嬉し涙[ureshinamida] happy tears
嬉笑[kishou] happy laughter

嬉しそう[ureshisou] delightful
嬉戯[kigi] frisking
嬉泣[ureshinaki] weeping for joy
嬉しがらせ[ureshigarase] flattery
嬉遊曲[kiyuukyoku] divertimento

に就て[nitsuite] concerning
に就き[nitsuki] because of
去就[kyoshuu] committing one's self
就いては[tsuiteha] in line with this
就きましては[tsukimashiteha] in line with this

就く[tsuku] to ascend (the throne)
就ける[tsukeru] to install (a king, emperor, etc.)
就学[shuugaku] entering school
就学義務[shuugakugimu] compulsory school attendance
就学児童[shuugakujidou] school child