Rave
Middle English (in the sense ‘show signs of madness’): probably from Old Northern French raver ; related obscurely to Middle Low German reven ‘be senseless, rave’.
wiktionary
From Middle English raven(“to rave; talk like a madman”), from Old French raver, variant of resver, of uncertain origin. Compare rove.
English dialect raves, or rathes(“a frame laid on a wagon, for carrying hay, etc.”).
rave
etymonline
rave (v.)
early 14c., raven, "to show signs of madness or delirium, to rage in speech," from Old French raver, variant of resver "to dream; wander here and there, prowl; behave madly, be crazy," a word of unknown origin (compare reverie). An identical (in form) verb meaning "to wander, stray, rove" dates from late 14c. in Scottish and northern dialect, and is probably from a Scandinavian word (such as Old Norse rafa). Sense of "talk about (something or someone) enthusiastically or immoderately" is recorded by 1704. Related: Raved; raving.
rave (n.)
1590s, "frenzy, great excitement," from rave (v.). Meaning "temporary popular enthusiasm" is from 1902; that of "highly flattering review" is by 1926 (when it was noted as a Variety magazine word). By 1960 as "rowdy party;" rave-up was British slang for "wild party" from 1940; the specific sense of "mass party with loud, fast electronic music and often psychedelic drugs" is by 1989.
