Meaning

adjective marked by or paying little heed or attention; --Franklin D. Roosevelt

adjective characterized by careless unconcern; - Edith Wharton

originEtymology tree English heed Proto-Indo-European *lewh₁- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English heedless From heed + -less.

Etymology from Wiktionary, CC BY-SA 3.0