かくやあらん

Meanings

it must be like this; surely it is so

usually written using kana alone

Archaic or highly literary expression conveying strong conjecture or rhetorical affirmation: 'this is how it must be' or 'surely it is so'. Not used in modern everyday speech.

古いにしえの賢けん人じんも斯かくやあらんと感かんじたに違ちがいない。
The ancient sages must have felt that it was just like this.
「斯かくやあらん」は古こ典てんで見みかける言いい回まわしだ。
The phrase 'kaku ya aran' is an expression one encounters in classical literature.