- infirmity, frailty, debility, feebleness, frailness - the state of being weak in health or body (especially from old age)
--1 is a kind of unfitness, poor shape, bad condition
--1 has particulars: asthenia, astheny; cachexia, cachexy, wasting - feebleness, tenuity - the quality of lacking intensity or substance; "a shrill yet sweet tenuity of voice"- Nathaniel Hawthorne
--2 is a kind of weakness