
The word
happy comes from the Old Norse
happ meaning “chance” or “luck.” The wildcard nature of chance is reflected in the wide range of words that share this root. While the adjective
happy-go-lucky, meaning “trusting cheerfully to luck” or “happily unconcerned or worried,” is widely used in positive contexts, its etymological cousin
haphazard, carries a more negative connotation. The expression
happy-be-lucky entered English slightly earlier than
happy-go-lucky, but fell out of use in the mid-1800s.