extenuate
Extenuate (adj) means Describes a person who is thin and weak, or a body part that has wasted away.
Etymology
From Middle English extenuat (“(medicine) made thin, emaciated”), from Latin extenuātus (“diminished, reduced, thinned”), perfect passive participle of extenuō (“to diminish, reduce, thin”) (see -ate (adjective-forming suffix)), from ex- (“out-, thoroughly”) + tenuō (“to enfeeble, weaken, wear down; to lessen, reduce; to make thin”), from tenuis (“fine, slender, thin; feeble, weak”) (ultimately from Proto-Indo-European *tenh₂- (“to extend, stretch; thin”)) + -ō (first conjugation-verb forming suffix). Compare attenuate.