feebless means feebleness; weakness, infirmity. Lexicurio rates it Sui generis — a strength score of 86 out of 100.
Etymology
From Old French feblesce, from feble (“feeble”).
noun
- Feebleness; weakness, infirmity.“They passing forth kept on their readie way, / With easie steps so soft as foot could stryde, / Both for great feeblesse, which did oft assay / Faire Amoret that scarcely she could ryde, / And eke through heavie armes […]”