(of work, reading etc) done without attention to details

casual, hasty

silly; foolish

stupid; crazy

not clear or bright; slow to understand; not exciting or interesting

unintelligent

without reason, sense or good judgement; silly

nonsensical, idiotic

(of a person) wasting time, energy etc in their work or duties

not working well; wasteful

unintelligent; foolish

not intelligent; irresponsible

of or on the surface only; not thorough or deep

without depth, detail

not acceptable

not suitable or satisfactory

not used or developed

immature