Where does “lễ lạc” come from?

lễ lạc (Vietnamese) comes from Vietnamese lễ, from Proto-Vietic k-lɛː.

Ancestry of “lễ lạc”, step by step

lễ lạc traces back through two separate lines of ancestry.

via Vietnamese lễ

StepLanguageWordMeaning
1Vietnameselễbribe; offering; festival, festive day, holiday;...
2Proto-Vietick-lɛː

via Vietnamese lạc

StepLanguageWordMeaning
1Vietnameselạclost; peanut, groundnut; stray
2Middle Chinese
Every word from Proto-Vietic k-lɛːEvery word from Vietnamese lễ