un- + vanquishable
unvanquishable (comparative more unvanquishable, superlative most unvanquishable)
- That cannot be vanquished; undefeatable, inconquerable.
- 1662, Thomas Stanley, The History of the Chaldaick Philosophy, Thomas Dring, page 52:
- [...] 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.]