さぞかし
嘸かし
sazokashi

Adverb

1. certainly; surely

Usually Written in Kana
Related to 嘸や
こんなにすばらしいほんくとは、著者ちょしゃはさぞかしりっぱな学者がくしゃだろう。
konnani subarashii hon'o kakutowa choshawa sazokashi rippana gakushadarō.
What a good scholar the author must be to write such a splendid book!