without due regard for the rights or feelings of others

It was inconsiderate of him to keep us waiting.

acting without consideration; thoughtless; heedless.

overhasty; rash; ill-considered

slovenly, inconsiderate reasoning.

adjective

considerate , generous , kind , nice , sensitive , tactful , thoughtful

adjective

boorish , brash , careless , discourteous , hasty , impolite , incautious , indelicate , intolerant , reckless , rude , self-centered , selfish , sharp , short , tactless , thoughtless , unceremonious , uncharitable , ungracious , unkind , unthinking , disregardful , unthoughtful , heedless , improvident , inattentive , indiscreet , insensitive , neglectful , rash , uncivil