Where does “四” come from?

四 (Korean) comes from Middle Chinese 四, from Proto-Sino-Tibetan *pV-lij — four.

Ancestry of “四”, step by step

StepLanguageWordMeaning
1Middle Chinese四—
2Proto-Sino-Tibetan*pV-lijfour
Every word from Proto-Sino-Tibetan *pV-lij →Every word from Middle Chinese 四 →