unassailable

音标发音

It is only by doing so that we can reach an unassailable consensus about the sun's true level of influence on the Earth and its climate.
但要做到这个，我们必须要对太阳真实水平以及其地球和气候影响得到一个无懈可击的共识。
It needed the most obvious and unassailable evidence to be presented before them before they were reluctantly forced to postulate a new particle.
我们要将最明显而又无懈可击的证据摆在他们眼前，否则他们也只是勉强被迫地接受这种新粒子。
The Social Democrats themselves took 30.9% of the vote, meaning that this once-unassailable political force just managed to cling on to its position as Sweden's largest party.
社会民主党赢得了30.9%的选票，这意味着这个曾经无懈可击的政党如今也成功的维持了他作为瑞典最大政党的地位。

And given how large that permanent war chest is, he can target companies previously thought unassailable.
FORBES: Carl Icahn Unleashed: Wall Street's Richest Man Is On The Attack -- Just Ask Michael Dell
Instead, they should simply acknowledge that people with integrity, people with unassailable good character, exist.
FORBES: Chief Justice John Roberts: An Object Lesson In Stellar Executive Comportment
In so doing he proved that he is a man of unassailable integrity and stellar character.
FORBES: Chief Justice John Roberts: An Object Lesson In Stellar Executive Comportment

If you describe something or someone as unassailable, you mean that nothing can alter, destroy, or challenge them.