A fool; a person who acts thoughtlessly or foolishly (literary/slightly contemptuous).
彼は自分の無責任な行為で周囲から愚者と見なされた。
He was regarded as a fool by those around him because of his irresponsible behavior.
人の失敗を見てすぐに愚者と決めつけるのはよくない。
It's not good to label someone a fool immediately after their mistake.
古い戯曲では、愚者が物語の真実を言う役回りになることがある。
In old plays, a fool sometimes plays the role of speaking the truth of the story.
The Fool (Tarot card) — the Tarot major arcana card often associated with new beginnings or leaps of faith.
占いで愚者のカードが出て、彼女は新しい挑戦を始める決心をした。
The Fool card appeared in the reading, and she decided to start a new challenge.
タロットの絵柄では、愚者はしばしば旅立ちを象徴する若者として描かれる。
In Tarot imagery, the Fool is often depicted as a young person symbolizing departure.