Morpheme
Ru(e) [Rue, Ru]
Type
free base
Denotation
regret, remorse, repentance, sorrow, repent, grieve, distress, make sorry
Etymology
Middle English rewe, reowe, rewen, ruwen, ruen, reowen; Old English hrēow, hrēowan
Evidence
rue, rued, rueful, ruefully, ruefulness, rueing, rueless, rues, ruesome, ruly, unrueing
Notes
found in the phrase “rue the day”
ruly denotes “pitiable, miserable” and “pitiably, miserably”