Where does “must” come from?

must (Middle English) comes from Old French must, from Latin mustum, from Latin mustus, from Proto-Indo-European mūs- — fly, stinging fly, gnat; moist, damp; swamp,...

must (Middle English): must wine that is not fully fermented

Definitions

  1. must wine that is not fully fermented

Ancestry of “must”, step by step

must traces back through two separate lines of ancestry.

via Old French must

StepLanguageWordMeaning
1Old Frenchmust
2Latinmustummust; unfermented or partially fermented grape...
3Latinmustusfresh, young; unfermented
4Proto-Indo-Europeanmūs-fly, stinging fly, gnat; moist, damp; swamp,...

via Old English must

StepLanguageWordMeaning
1Old Englishmustmust newly or partially fermented wine

Words derived from “must

Every word from Proto-Indo-European mūs-Every word from Latin mustusEvery word from Latin mustum