Meaning

adjective marked by lack of attention or consideration or forethought or thoroughness; not careful

adjective effortless and unstudied

adjective (usually followed by `of') without due thought or consideration

originEtymology tree Proto-Indo-European *ǵeh₂r-der. Proto-Germanic *karō Proto-West Germanic *karu Old English caru 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 Old English carlēas Middle English careles English careless From Middle English careles, from Old English…

Etymology from Wiktionary, CC BY-SA 3.0