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