insentient

From in- +‎ sentient.

insentient (comparative more insentient, superlative most insentient)

1. Having no consciousness or feeling; inanimate.
   • 1915, DH Lawrence, The Rainbow, Vintage 2011, p. 367:

     [O]ver her flayed, exposed soul of a young girl who had gone open and warm to give herself to the children, there set a hard, insentient thing, that worked mechanically according to a system imposed.

2. (rare) Insensitive, indifferent.
   • 1941, Theodore Roethke, “Death Piece”, in Open House, New York, N.Y.: Alfred A[braham] Knopf, →OCLC; republished in The Collected Poems of Theodore Roethke, London: Faber and Faber […], 1968, →OCLC, page 4:

     His thought is tied, the curving prow / Of motion moored to rock; / And minutes burst upon a brow / Insentient to shock.