emaciated (adj.)

1620s "cause to lose flesh" (implied in emaciating), from Latin emaciatus, past participle of emaciare "make lean, cause to waste away," from assimilated form of ex "out" (see ex-) + macies "leanness," from macer "thin" (from PIE root *mak- "long, thin"). Intransitive meaning "become lean, waste away" is from 1640s. Related: Emaciated.