The word "tenuity" comes from the Latin word "tenuis," which means "thin," "slender," or "delicate." It is related to the words "tender" and "tenuous," which also convey the idea of weakness or fragility.
Examples:
"The tenuity of the glass made me handle it with great care."
"The tenuity of their evidence did not convince the jury."
"A feeling of tenuity came over her as she watched the fragile butterfly."