not busy

lackadaisical lax lethargic permissive sluggish stagnant

delinquent derelict dull idle quiet slow

asleep on the job behindhand careless dilatory disregardful dormant easygoing faineant fainéant inactive inattentive indolent inert neglectful quiescent regardless remiss slothful slow-moving tardy

active energetic lively strict

busy careful intelligent quick smart

alert disciplined rigid stiff taut tight