Where does “気にする” come from?

気にする (Japanese) comes from Japanese する, from Old Japanese す, from Proto-Japonic *su — nest.

気にする (Japanese): to care about something, to pay undue attention...

Definitions

  1. to care about something, to pay undue attention...

Ancestry of “気にする”, step by step

気にする traces back through two separate lines of ancestry.

via Japanese する

StepLanguageWordMeaning
1Japaneseするto exist; to come up; to exist; to be worth; to...
2Old Japaneseすto do; to happen, occur; to be in a state of...
3Proto-Japonic*sunest

via Japanese 気

StepLanguageWordMeaning
1Japanese気spirit, mood; inclination, will, mood, urge;...
2Middle Chinese氣spirit; breath
Every word from Proto-Japonic *su →Every word from Old Japanese す →Every word from Japanese する →