undoubtable

比較不可稀用

(rare) Incapable of being doubted; undoubted; indubitable.

日本語の意味

疑いの余地がない、疑うことができないほど明白な

The evidence was undoubtable, leaving the committee with no choice but to act.

その証拠は疑いの余地がなく、委員会は行動せざるを得なかった。

意味（1）

(rare) Incapable of being doubted; undoubted; indubitable.

Her undoubtable quality had a non-individual flavour, as if standing for her class.