JMdict: 1550010

理性 【りせい】

  1. [n] reason; reasoning power; (one's) sense
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
理 Logic, Arrangement, Reason, Justice, Truth リ ことわり
性 Sex, Gender, Nature セイ, ショウ さが

Words often seen with this one: (experimental feature)

人間 (15), こと (11)