Why was "tantrum" trending last week?
mid-14c., from Old French; morning Church service in which psalms of praise to God (Psalms 148-150) are sung (see laud).
late 14c., from Old French lauder "praise, extol," from Latin laudare "to praise, commend, honor, extol, eulogize," from laus (genitive laudis) "praise, fame glory." Probably cognate with Old English leoð "song, poem, hymn," from Proto-Germanic *leuthan (cf. Old Norse ljoð "strophe," German Lied "song," Gothic liuþon "to praise"), and from an echoic PIE root *leu-. Related: Lauded; lauding.