Choose the perfect synonym or antonym for the word Not paying enough attention or thought to avoiding harm or errors
Careless
/ˈkeələs/Synonyms:
Antonyms:
Examples:
He was careless and broke the glass.Don't be careless with important documents.
Etymology:
Originating from Middle English careles, which is derived from the Old English carleas, combining care (worry, attention) with the suffix -less (without).
Usage Statistics:
45 mentions per 1 million words 
Hint: Frequency according to COCA
Often
Hint: Frequency according to COCA
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