untenable

鉴于新的证据，该立场无法维持。

The position is ___untenable in light of new evidence.

公司的债务水平已经发展到难以为继的地步，迫使它在数月内进行重组。

The company's debt level had grown ___untenable, forcing a restructuring within months.

他声称自己整晚都在家，但在三位目击证人指认他在酒吧后，这个说法就站不住脚了。

His claim that he had been at home all evening became ___untenable when three witnesses placed him at the bar.