thoughtless

adjectives

showing lack of careful thought

"the debate turned into thoughtless bickering"

thoughtless

is derived from

antonym

is similar to

without proper consideration or reflection

"slovenly inconsiderate reasoning"; "unconsidered words"; "prejudice is the holding of unconsidered opinions"

is similar to

not exhibiting or characterized by careful thought

see also

lacking regard for the rights or feelings of others

"shockingly inconsiderate behavior"

is an attribute of

the trait of thinking carefully before acting

without care or thought for others

"the thoughtless saying of a great princess on being informed that the people had no bread; `Let them eat cake'"

thoughtless, uncaring, unthinking

is derived from