Where does “重心” come from?

重心 (Japanese) comes from Japanese 心, from Old Japanese 心, from Proto-Japonic *kəkərə — heart.

重心 (Japanese): center of gravity, centroid

Definitions

  1. center of gravity, centroid

Ancestry of “重心”, step by step

重心 traces back through two separate lines of ancestry.

via Japanese 心

StepLanguageWordMeaning
1Japanese心mind, heart, spirit, soul; thoughts, ideas;...
2Old Japanese心heart, mind, spirit; emotion, feeling; heart,...
3Proto-Japonic*kəkərəheart

via Japanese 重力

StepLanguageWordMeaning
1Japanese重力gravity, gravitational force; considerable...
2Middle Chinese重力—
Every word from Proto-Japonic *kəkərə →Every word from Old Japanese 心 →Every word from Japanese 心 →