As a verb vanquish
is to defeat, to overcome.
As an adjective unvanquishable is
that cannot be vanquished; undefeatable, inconquerable.
Other Comparisons: What's the difference?
To defeat, to overcome.
- They vanquished the rebels in all encounters.
- This bold assertion has been fully vanquished in a late reply to the Bishop of Meaux's treatise.
That cannot be vanquished; undefeatable, inconquerable.