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English word must comes from Latin mustus (Fresh, young. Unfermented (wine).)
mustus (Latin)
Fresh, young. Unfermented (wine).
most (Old French)
must (English)
Fruit juice that will ferment or has fermented, usually grapes.. Something that exhibits the property of being stale or musty.. The property of being stale or musty. (intransitive) To become musty.. (transitive) To make musty.