taru-adjective, adverb taking the 'to' particle
Describes a clear, unmistakable distinction or separation, often used in formal or literary contexts. Functions as a taru-adjective or adverb with と.
両者の意見は画然と分かれた。
Their opinions were clearly divided.
善悪の区別を画然と示す。
It shows a sharp distinction between good and evil.
From the kanji 画 (drawing, boundary) and 然 (state, condition), suggesting a state of being clearly delineated. The exact historical derivation is uncertain.