Where does “마음속” come from?

마음속 (Korean) comes from Korean 속, from Chinese 俗.

마음속 (Korean): one's heart, the bottom of one's heart, one's...

Definitions

  1. one's heart, the bottom of one's heart, one's...

Ancestry of “마음속”, step by step

마음속 traces back through two separate lines of ancestry.

via Korean 속

StepLanguageWordMeaning
1Korean속the inside; especially that which is underneath...
2Chinese俗—

via Korean 마음

StepLanguageWordMeaning
1Korean마음mind; heart
2Old Korean心音mind
Every word from Chinese 俗 →Every word from Korean 속 →