Word: stillest

motionless, unmoving, not moving a muscle, stock-still, immobile, inanimate, like a statue, as if turned to stone, rooted to the spot, transfixed, static, stationary, quiet, silent, hushed, soundless, noiseless, undisturbed, calm, peaceful, serene, windless, stilly, flat, even, smooth, placid, tranquil, pacific, waveless, glassy, like a millpond, unruffled, stagnant, inactive