ついぞ
終ぞ
tsuizo

Adverb

1. never; not at all

Usually Written in Kana
かれ友人ゆうじん期待きたい裏切うらぎるかもしれないとはついぞおもわなかった。
karega yūjinno kitaio uragirukamo shirenaitowa tsuizo omowanakatta.
It never occurred to me that he might fail his friend.