apraxia (n.)

"loss of the knowledge of the uses of things," 1877, medical Latin, from German apraxie, coined 1871 by German philologist and philosopher Heymann Steinthal (1823-1899), from Greek apraxia "inaction," from a- "not, without" (see a- (3)) + praxis "a doing, action, business" (see praxis) + abstract noun ending -ia.