perfunctory

Done merely as a duty or routine, without genuine interest, effort, or enthusiasm.

Examples

Tom gave a perfunctory nod to his colleague as he rushed past.
Her apology sounded perfunctory, as if she didn't really mean it.
The inspector's perfunctory check missed several safety violations.

All Words

alacrity
A cheerful readiness or willingness to do something; brisk and eager action.
quiescent
In a state of inactivity or rest; quiet and still, often temporarily.
perspicacious
Having a keen mental understanding or insight; able to notice and understand things that are not obvious to most people.

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