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

貞はる[sadaharu] to harp too long on a subject
貞潔[teiketsu] chastity
貞淑[teishuku] chastity
貞女[teijo] virtuous woman
貞節[teisetsu] chastity

貞操[teisou] chastity
貞操観念[teisoukannen] sense of virtue
貞操蹂躪[teisoujuurin] violation of chastity
童貞[doutei] virginity (esp. of a man)
不貞[futei] unfaithfulness