Meaning

adjective other than as supposed or expected

adverb in other respects or ways

adverb in another and different manner

originFrom Middle English otherwise, othre wise, from Old English on ōþre wīsan (literally “in (on) other/different manner”); equivalent to other + -wise. Compare West Frisian yn oarwei (“otherwise”), Icelandic öðruvísi (“different”).

Etymology from Wiktionary, CC BY-SA 3.0