careless

• "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"

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

• "careless of the consequences"
• "crushing the blooms with regardless tread"

Synonyms

• careless(p)
• regardlessin spite of everything; (usually followed by `of') without due thought or consideration