WordNet sense 1 (lacking sensation):

benumbed, numb

WordNet sense 2 (incapable of physical sensation):

insensible

WordNet sense 3 (inclined to or marked by drowsiness):

somnolent

WordNet sense 4 (in a condition of biological rest or suspended animation):

dormant

WordNet sense 5 (in a state of repose or especially sleep):

at rest

WordNet sense 6 (dead):

deceased, departed, gone, at peace

WordNet sense 7 (no longer having or seeming to have or expecting to have life):

dead