nought (n., pron.)

Middle English, from Old English nowiht "nothing," variant of nawiht (see naught). Meaning "zero, cipher" is from early 15c. Expression for nought "in vain" is from c. 1200. To come to nought is from early 15c. (become to naught, ycome to naught are from c. 1300).

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Definitions of nought from WordNet

nought (n.)
a mathematical element that when added to another number yields the same number;
Synonyms: zero / " / cipher / cypher