busiest

active unavailable working

buried employed engaged engrossed hustling occupied overloaded persevering slaving snowed swamped

already taken assiduous at it diligent having a full plate having enough on one's plate having fish to fry having many irons in the fire in a meeting in conference in someone else's possession in the field in the laboratory industrious on assignment on duty on the go tied up up to one's ears with a customer

idle

inactive unoccupied

lazy quiet unbusy unemployed unengaged

bustling full hectic lively restless

humming hustling popping tiring

busy as a beaver energetic fussy strenuous tireless

idle inactive lazy quiet unbusy unemployed unengaged

curious

forward interfering meddling prying stirring

butting in inquisitive intrusive meddlesome nebby obtrusive officious pushy snoopy troublesome

idle inactive lazy quiet unbusy unemployed unengaged