adj. 25B6; adjective
careless motorists : INATTENTIVE, incautious, negligent, remiss; heedless, irresponsible, impetuous, reckless.
careless work : SHODDY, slapdash, slipshod, scrappy, slovenly, sloppy, negligent, lax, slack, disorganized, hasty, hurried; informal slap-happy.
a careless remark : THOUGHTLESS, insensitive, indiscreet, unguarded, incautious, inadvertent.
she was very careless of investments : NEGLIGENT, heedless, improvident, unconcerned, indifferent, oblivious.
careless masculine grace : UNSTUDIED, artless, casual, effortless, nonchalant, insouciant, languid.
careful, meticulous.