care·less 
/ˈkeɚləs/ adjective
/ˈkeɚləs/ adjective [more careless; most careless] 1 : not using care : not careful
▪ He is a careless worker. ▪ She was careless with my things. 2 : done, made, or said without enough thought or attention
▪ It was a careless mistake. ▪ I made a careless [=rude, thoughtless] remark. ▪ a newspaper known for careless reporting
▪ He is a careless worker. ▪ She was careless with my things.
▪ It was a careless mistake. ▪ I made a careless [=rude, thoughtless] remark. ▪ a newspaper known for careless reporting
— care·less·ly adverb
▪ She carelessly left the stove on.
▪ She carelessly left the stove on.
— care·less·ness noun [noncount]
▪ The mistake was the result of carelessness.
▪ The mistake was the result of carelessness.
