careless Definition

careless
adj

1. Not careful or thorough enough; inattentive.

Thesaurus: inattentive, slipshod, inaccurate, remiss, perfunctory, cursory, slapdash, offhand, negligent; Antonym: meticulous, accurate, careful.
2. Lacking or showing a lack of a sense of responsibility.

Thesaurus: irresponsible, absent-minded, heedless, forgetful, lax, lackadaisical, nonchalant, unconcerned.
3. Effortless.

Example: careless charm

Derivative: carelessly
adverb

Derivative: carelessness
noun