Inner thoughts - Nashin

Japanese: 内心 - ないしん

〘noun〙① The innermost part of one's mind. One's innermost thoughts. One's chest. ※From Sankyo Shiki (around 797): "Long ago, the First Emperor of Qin and the Emperor Wu of Han secretly wished to be immortals, but shared the same external affairs as the common people." [Setsuen - Shubun] ② To secretly communicate one's thoughts. To agree and act together. Intimate knowledge. ※From the Toji Yuri Documents - September 23, 1450 (2nd year of the Hotoku era), a petition from Kiyomasu, the inspector general of Nishida Iuchi in Oyamaso, Tanba: "I do not serve the peasants in my heart." ③ In mathematics, the center of a circle inscribed in a polygon. It is often used especially for triangles. ⇔ circumcenter. [English-Japanese Dictionary of Mathematical Dictionary (1889)]

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① 心の内部。心中。胸中。※三教指帰（797頃）中「昔、秦始皇、漢武帝、内心願仙、外事同俗」〔説苑‐脩文〕② 心をひそかに通わせること。同意して行動を共にすること。内通。※東寺百合文書‐に・宝徳二年（1450）九月二三日・丹波大山荘西田井内検上使清増起請文「百姓に内心不仕候」③ 数学で、多角形に内接する円の中心。特に三角形に対して用いることが多い。⇔外心。〔数学ニ用ヰル辞ノ英和対訳字書（1889）〕

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