Old English sendan "send, send forth; throw, impel," from Proto-Germanic *sandijan (cf. Old Saxon sendian, Old Norse and Old Frisian senda, Middle Low German and Middle Dutch senden, Dutch zenden, German senden, Gothic sandjan), causative form of base *sinþan, denoting "go, journey" (source of Old English sið "way, journey," Old Norse sinn, Gothic sinþs "going, walk, time"), from PIE root *sent- "to head for, go" (cf. Lithuanian siusti "send;" see sense (n.)).
Also used in Old English of divine ordinance (e.g. godsend, from Old English sand "messenger, message," from Proto-Germanic *sandaz "that which is sent"). Slang sense of "to transport with emotion, delight" is recorded from 1932, in American English jazz slang.
To arouse keen admiration, esp as an ecstatic response; excite; TURN someone ON: Bessie Smith really sent him (1932+ Jazz talk)