unassailable

The hosts now have two days to complete the victory that would give them an unassailable 3-1 series lead.

These companies had an unassailable head start when it came to producing petrol or diesel-powered cars.

Their arsenal demands complete vulnerability and unassailable empathy, allowing them not just to inhabit someone entirely different from themselves, but live inside the character.

At the Ivors, I accidentally misquote this back to him as "an unassailable guitar record".

After that bizarre election outcome last July, incoming Prime Minister Keir Starmer, a bluff, lawyerly person with no evident ideological convictions, arrived at 10 Downing Street with an unassailable majority but essentially no popular mandate.