英语词源字典 - 在线词源网站

lovelorn (adj.): also love-lorn, "pining for love," 1630s, from love (n.) + lorn. Perhaps coined by Milton.
opine (v.): "express an opinion," mid-15c., from Middle French opiner (15c.) and directly from Latin opinari "have an opinion, be of opinion, suppose, conjecture, think, judge," perhaps related to optare "to desire, choose" (see option). Related: Opined; opining.
pine (v.): Old English pinian "to torture, torment, afflict, cause to suffer," from *pine "pain, torture, punishment," possibly ultimately from Latin poena "punishment, penalty," from Greek poine (see penal). A Latin word borrowed into Germanic (Middle Dutch pinen, Old High German pinon, German Pein, Old Norse pina) with Christianity. Intransitive sense of "to languish, waste away," the main modern meaning, is first recorded early 14c. Related: Pined; pining.
repine (v.): "to be fretfully discontented," mid-15c., probably from re-, here likely an intensive prefix, + pine (v.) "yearn." Related: Repined; repining.