Meaning

verb make dizzy or giddy

adjective having or causing a whirling sensation; liable to falling

adjective lacking seriousness; given to frivolity

originFrom Middle English dysy, desy, dusi, from Old English dysiġ (“stupid, foolish”), from Proto-West Germanic *dusīg (“stunned; dazed”). Akin to West Frisian dize (“fog”), Dutch deusig, duizig (“dizzy”), duizelig (“dizzy”), German dösig (“sleepy; stupid”).

Etymology from Wiktionary, CC BY-SA 3.0