atrophy (n.)

"a wasting away through lack of nourishment," 1610s (atrophied is from 1590s), from French atrophie, from Late Latin atrophia, from Greek atrophia "a wasting away," abstract noun from atrophos "ill-fed, un-nourished," from a- "not, without" (see a- (3)) + trophe "nourishment," from trephein "to fatten" (see -trophy).

"to waste away," 1808, from atrophy (n.). Related: Atrophied; atrophying.