Nut comes from Middle English nute, from Old French note, from Latin nota meaning "mark" or "sign," ultimately from Proto-Indo-European newd- meaning "to notice" or "to know."
nut (English): A hard-shelled seed; A piece of metal, usually...
Definitions
A hard-shelled seed; A piece of metal, usually...
Ancestry of “nut”, step by step
nut traces back through two separate lines of ancestry.