1. unchallengeable - Adjective
2. unchallengeable - Adjective Satellite
not open to challenge
Source: WordNetI can offer you no final truths, complete and unchallengeable. Mario Cuomo
unchallengeable facts Source: Internet
a position of unchallengeable supremacy Source: Internet
The magister equitum, like the Dictator, had unchallengeable authority in all civil and military affairs, with his decisions only being overturned by the Dictator himself. Source: Internet
In pagan religions, the king was often seen as a kind of god and so was an unchallengeable despot. Source: Internet
In practical terms, that meant that Hadrian was de facto general commander of the Eastern Roman army, something that made his power position as a potential claimant to the throne unchallengeable. Source: Internet