Meaning

adjective filled or abounding with fog or mist

adjective wet with mist

originFrom Middle English misty, mysty, misti, from Old English mistiġ (“misty, dark”), from Proto-West Germanic *mistig (“misty”), equivalent to mist + -y. Cognate with Scots misty, mistie (“misty”), West Frisian mistich (“misty, foggy”), Dutch mistig (“misty, foggy”), German Low German mistig (“foggy”).

Etymology from Wiktionary, CC BY-SA 3.0