thinShe's on a diet but I think she's already too thin.
skinnymainlydisapprovingYou should eat more. You're much too skinny.
scrawnyHe hated his scrawny legs.
slimHe was tall, very slim, with pale, deep-set eyes.
petiteapprovingShe was a petite woman with long, blonde hair.
svelteIt's no wonder he's so svelte - he's a gymnast.
litheThe dancers were lithe and graceful.
leanAll the runners I know are quite lean.
wiryDon't let him fool you - he's wiry but quite strong.
emaciatedformalShe arrived at the hospital emaciated and weak.
gauntHe looked at her tired and gaunt face.
bonyHe has long, bony fingers.