Meaning of だかつ in Japanese

It seems that your search contains the following:

Definition of だかつ

だかつ(dakatsu) 【蛇蠍 ·蛇蝎】

いまだかつて(imadakatsute) 【未だかつて ·未だ嘗て ·未だ曾て】

(exp) not until now (with neg. verb); never yet
そんなものは未だかつて見たことがない。
Never have I seen such a thing.

彼かれはいまだかつてない偉大な人ひとだ。

He is the greatest man who has ever lived.

彼かれはいまだかつてないぐらいくらい偉大な物理学者ぶつりがくしゃである。

He is as great a physicist as ever lived.

Never have I seen such a thing.

Nothing great was ever achieved without enthusiasm.

いまだかつて、神かみを見たものはいないいる。

No one has ever seen God.