This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

理性

Reading

Kana: りせい
Romaji: risei
Kana
Romaji

Definition

1

reason; reasoning power; (one's) sense

Kanji

Readings: リ、 ことわり
Meanings: logic, arrangement, reason, justice, truth
Readings: セイ、 ショウ、 さが
Meanings: sex, gender, nature

Example Sentences

(かれ)理性的(りせいてき)(ひと)だ。
➥He is a man of reason.
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人間(にんげん)理性(りせい)動物(どうぶつ)である。
➥Man is a rational animal.
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(いか)りが(かれ)から理性(りせい)(うば)った。
➥Anger deprived him of his reason.
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動物(どうぶつ)には理性(りせい)がない。
➥Animals have no reason.
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人間(にんげん)理性的(りせいてき)存在(そんざい)である。
➥Man is a rational being.
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ホワイト()理性的(りせいてき)(ひと)だ。
➥Mr White is a man of reason.
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