Where does “lạc đề” come from?

lạc đề (Vietnamese) comes from Vietnamese lạc, from Middle Chinese 落.

lạc đề (Vietnamese): to fail to address the topic of the question at hand

Definitions

  1. to fail to address the topic of the question at hand

Ancestry of “lạc đề”, step by step

lạc đề traces back through two separate lines of ancestry.

via Vietnamese lạc

StepLanguageWordMeaning
1Vietnameselạclost; peanut, groundnut; stray
2Middle Chinese落—

via Vietnamese đề

StepLanguageWordMeaning
1Vietnameseđềset of questions for an examination or test;...
2Middle Chinese提—
Every word from Middle Chinese 落 →Every word from Vietnamese lạc →
lạc đề — Etymology, Origin & Word History | Etymology Explorer