Meaning of 嘸 in Japanese

Definition of 嘸

さぞ(sazo) 【嘸】

(adv) I am sure; certainly; no doubt →Related words: 嘸かし , 嘸や
さぞショックだったでしょう。
It must have been a shock to you.

さぞかし(sazokashi) 【嘸かし】

(adv) certainly; surely →Related words: 嘸 , 嘸や
こんなにすばらしい本を書くとは、著者はさぞかしりっぱな学者だろう。
What a good scholar the author must be to write such a splendid book!

さぞや(sazoya) 【嘸や】