(a.) Thin; lank.

airy attenuate attenuated back-door backstairs boyish clandestine covert cowering cringing delicate diaphanous diluted ethereal feline fine fine-drawn finespun flimsy frail furtive gauzy girlish gossamer gracile hidlings hole-and-corner hugger-mugger insubstantial lacy light misty papery privy quailing quiet rare rarefied shifty skulking slender slenderish slight slight-made slim slimmish slinking sly small sneaking sneaky stealthy subtle surreptitious svelte sylphlike tenuous thin thin-bodied thin-set thin-spun thinnish threadlike under-the-counter under-the-table undercover underground underhand underhanded unobtrusive vague wasp-waisted watered watered-down watery weak willowy wiredrawn wispy