つゆいささかも

adverb

never; by no means; not in the least

Emphatic negative adverb used with a negative verb. Stronger than 少しも or 決して. Literary and somewhat old-fashioned.

• 彼かれの言こと葉ばをつゆいささかも疑うたがわなかった。

  I never doubted his words in the slightest.

• その知しらせを聞きい