careless
adjective
marked by lack of attention or consideration or forethought or thoroughness; not careful
“careless about her clothes”
“forgotten by some careless person”
Oppositescarefuleffortless and unstudied
“an impression of careless elegance”
“danced with careless grace”
(usually followed by `of') without due thought or consideration
“careless of the consequences”
“crushing the blooms with regardless tread”
Synonymsregardless
Source: WordNet 3.1, Princeton University
