a. rare. (UN-1 7.)
1618. Florio, Impoderoso, vnmightie, vnpowerfull.
1656. Cowley, Davideis, I. 48. He envyd him a Kings unpowerful Hate.
1777. J. Richardson, Dissert. East. Nations, 21. A distinct body of harmless and unpowerful people.
Hence Unpowerfulness.
1625. Darcie, Ann., a 4. It lies meerely in their owne vnpowerfulnesse, that they doe not ouerthrow his Empire.