perfunctory
Definitions
Carried out with a minimum of effort or reflection.
Performed merely as a routine duty; hasty and superficial.
Examples
He gave a perfunctory nod to the audience before rushing off the stage.
The security guard performed a perfunctory check of the bags, barely glancing inside them.
Synonyms
cursory superficial mechanical hasty careless automatic indifferent
Antonyms
thorough meticulous diligent attentive careful painstaking enthusiastic