Song
Old English sang, of Germanic origin; related to Dutch zang and German Sang, also to sing.
wiktionary
From Middle English song, sang, from Old English sang, from Proto-Germanic *sangwaz(“singing, song”), from Proto-Indo-European *sengʷʰ-(“to sing”). Cognate with Scots sang, song(“singing, song”), Saterland Frisian Song(“song”), West Frisian sang(“song”), Dutch zang(“song”), Low German sang(“song”), German Sang(“singing, song”), Swedish sång(“song”), Norwegian Bokmål sang(“song”), Norwegian Nynorsk song(“song”), Icelandic söngur(“song”), Ancient Greek ὀμφή(omphḗ, “voice, oracle”). More at sing.
etymonline
song (n.)
Old English sang "voice, song, art of singing; metrical composition adapted for singing, psalm, poem," from Proto-Germanic *songwho- (source also of Old Norse söngr, Norwegian song, Swedish sång, Old Saxon, Danish, Old Frisian, Old High German, German sang, Middle Dutch sanc, Dutch zang, Gothic saggws), from PIE *songwh-o- "singing, song," from *sengwh- "to sing, make an incantation" (see sing (v.)).
Phrase for a song "for a trifle, for little or nothing" is from "All's Well" III.ii.9 (the identical image, por du son, is in Old French. With a song in (one's) heart "feeling joy" is first attested 1930 in Lorenz Hart's lyric. Song and dance as a form of vaudeville act is attested from 1872; figurative sense of "rigmarole" is from 1895.
