careless(p)

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"

effortless and unstudied

"an impression of careless elegance"; " danced with careless grace"

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

"careless of the consequences"

同义词：regardless