Where does “석달” come from?

석달 (Korean) comes from Korean 석, from Middle Chinese 石.

석달 (Korean): trimester; three months

Definitions

  1. trimester; three months

Ancestry of “석달”, step by step

석달 traces back through two separate lines of ancestry.

via Korean 석

StepLanguageWordMeaning
1Korean석three before certain classifiers
2Middle Chinese石—

via Korean 달

StepLanguageWordMeaning
1Korean달moon; month
Every word from Middle Chinese 石 →Every word from Korean 석 →
석달 — Etymology, Origin & Word History | Etymology Explorer