inert
dead, dormant, dull, idle, immobile, inactive, inanimate, indolent, lazy, leaden, lifeless, motionless, passive, quiescent, slack, slothful, sluggish, slumberous (chiefly poetic) static, still, torpid, unmoving, unreactive, unresponsive
Antonyms
active, alive, alive and kicking, animated, energetic, full of beans (informal) living, mobile, moving, reactive, responsive, vital