no

The word 'no' originates from the Old English 'nā', a compound of 'ne' (meaning 'not') and 'ā' (meaning 'ever'). This Old English form descended from the Proto-Germanic 'nai' and further from the Proto-Indo-European 'ne', a primary particle of negation. Over centuries, the form simplified from 'nā' to the Middle English 'no', shedding the explicit sense of 'ever' and solidifying its role as a universal negative. Its journey represents the common linguistic phenomenon where a compound expression contracts into a fundamental, indispensable function word.

This is a simplex word of Old English origin, functioning as a negative particle.