1. thinness, tenuity, slenderness, dimension

usage: relatively small dimension through an object as opposed to its length or width; "the tenuity of a hair"; "the thinness of a rope"

2. rarity, tenuity, low density, density, denseness

usage: a rarified quality; "the tenuity of the upper atmosphere"

3. feebleness, tenuity, weakness

usage: the quality of lacking intensity or substance; "a shrill yet sweet tenuity of voice"- Nathaniel Hawthorne

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See also: tenuity (Dictionary)