unvanquishable

comparative more unvanquishable · superlative most unvanquishable

1. That cannot be vanquished; undefeatable, inconquerable.

   Rise like Lions after slumber / In unvanquishable number

   1819 (date written), Percy Bysshe Shelley, The Masque of Anarchy. A Poem. […], London: Edward Moxon […], published 1832, →OCLC

   1 more example

   [...] if a man shall give his mind to these [i.e. stones, and herbs, and charms], he shall not only render his soul unvanquishable by passions, but shall also preserve his body the better in health: [etc.]

   1662, Thomas Stanley, The History of the Chaldaick Philosophy, Thomas Dring, page 52

   Antonyms: vanquishable