overloaded

active unavailable working

buried employed engaged engrossed hustling occupied 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

exhausted fatigued overburdened strained

overtaxed stressed tense

burned out stressed out under stress

lively refreshed

arranged congested crowded filled jam-packed jammed loaded overflowing stuffed swarming wrapped

brimming bundled chock compact compressed consigned crammed mobbed seething

awash brimful chock-full full to the gills packed like sardines serried to the roof tumid up to the hilt up to the rafters wall-to-wall

clear empty uncongested uncrowded

deserted

cumbersome imbalanced unbalanced

bulky lopsided overweight tottering uneven

balanced ballasted equalized even stabilized