careless

Từ điển American Heritage Dictionary 4th

care·less (kârʹlĭs)adj.
1. Taking insufficient care; negligent:
a careless housekeeper; careless proofreading.
2. Marked by or resulting from lack of forethought or thoroughness:
a careless mistake.
3. Showing a lack of consideration:
a careless remark.
4. Unconcerned or indifferent; heedless:
careless of the consequences.
5. Unstudied or effortless:
danced with careless grace.
6. Exhibiting a disposition that is free from cares; cheerful:
a careless grin; a careless wave of the hand. careʹless·ly adv.careʹless·ness n. 
Synonyms: careless, heedless, thoughtless, inadvertent
These adjectives apply to what is marked by insufficient care or attention. Careless often implies negligence: “It is natural for careless writers to run into faults they never think of” (George Berkeley). Heedless often suggests recklessness: “We have always known that heedless self-interest was bad morals; we know now that it is bad economics” (Franklin D. Roosevelt). Thoughtless applies to actions taken without due consideration: “But thoughtless follies laid him low / And stain'd his name” (Robert Burns). Inadvertent implies unintentional lack of care: With an inadvertent gesture, she swept the vase off the table.

• Từ đồng nghĩa / Synonyms:
  careless(p), regardless