De-crēp′it, a.

a. [Lat. decrepitus, originally noised out, noiseless, applied to old people, who creep about quietly, from de and crepare, crepitare, to make a noise, to rattle; Fr. décrépit, Pr. decrepit, Sp., Pg., & It. decrepito.] Broken down with age; wasted or worn by the infirmities of old age; in the last stage of decay. “Beggarly or decrepit age.” Milton. “Already decrepit with premature old age.” Motley.

Sometimes incorrectly written decrepid.