marked by lack of attention or consideration or forethought or thoroughness; not careful
Careless about her clothes. Forgotten by some careless person. A careless housekeeper. Careless proofreading. It was a careless mistake. Hurt by a careless remark.
source: WordNet 3.0
Free from care or anxiety. hence, cheerful; light-hearted.
source: Webster 1913
adjective satellite
effortless and unstudied
An impression of careless elegance. Danced with careless grace.
source: WordNet 3.0
(usually followed by `of') without due thought or consideration
Careless of the consequences. Crushing the blooms with regardless tread.
