rueyoudaoicibaDictYouDict[rue 词源字典]
rue: Rue ‘regret’ [OE] and rue the plant [14] are distinct words. The former goes back to a prehistoric Germanic source, of uncertain ultimate origins, which meant ‘distress’, and which also produced German reuen and Dutch rouwen. In the early Middle English period, when it still meant ‘cause to feel pity’ (a sense which has now died out), a noun ruth ‘pity’ was formed from it, which survives in ruthless [14]. And a cognate noun rue once existed too, meaning ‘sorrow, regret’, which also lives on only in the form of a derivative: rueful [13]. The plant-name rue comes via Old French rue and Latin rūta from Greek rhūté.
=> rueful, ruthless[rue etymology, rue origin, 英语词源]
rue (v.)youdaoicibaDictYouDict
"feel regret," Old English hreowan "make sorry, distress, grieve" (class II strong verb; past tense hreaw, past participle hrowen), from Proto-Germanic *khrewan (cognates: Old Frisian riowa, Middle Dutch rouwen, Old Dutch hrewan, German reuen "to sadden, cause repentance"); in part, blended with Old English weak verb hreowian "feel pain or sorrow," and perhaps influenced by Old Norse hryggja "make sad," both from Proto-Germanic *khruwjan, all from PIE root *kreue- (2) "to push, strike" (see anacrusis). Related: Rued; ruing.
rue (n.1)youdaoicibaDictYouDict
perennial evergreen shrub, late 14c., from Old French rue (13c.), earlier rude, from Latin ruta "rue," probably from Greek rhyte, of uncertain etymology, originally a Peloponnesian word. The bitter taste of its leaves led to many punning allusions to rue (n.2.).
rue (n.2)youdaoicibaDictYouDict
"sorrow, repentance," Old English hreow "grief, repentance, sorrow, regret, penitence," common Germanic (Frisian rou, Middle Dutch rou, Dutch rouw, Old High German (h)riuwa, German reue), related to the root of rue (v.).
rue (n.3)youdaoicibaDictYouDict
French for "street," from Vulgar Latin *ruga (source also of Old Italian ruga), properly "a furrow," then in Medieval Latin "a path, street" (see rough (adj.)).