The word "不只" (bù zhǐ) is formed through the grammatical combination of the negation adverb "不" (bù, meaning "not") and the restrictive adverb "只" (zhǐ, meaning "only, merely"). This formation follows a common pattern in Chinese where a negative marker is placed before another adverb or verb to create a new logical meaning. Literally, it negates the idea of limitation or singularity expressed by "只," thereby shifting the meaning from "only" to "not only" or "more than." It functions as a conjunction or adverb used to introduce additional information, similar to the English "not only... but also..." construction, and its meaning is derived directly from the sum of its two constituent parts.