The word "毫不" is formed through the direct and intuitive combination of its two constituent characters, where "毫" (háo), which originally refers to the fine tip of a hair and by extension means "the slightest amount" or "a minuscule bit", is paired with "不" (bù), meaning "not". The formation is essentially a conceptual fusion: by placing "not" in front of "the smallest unit", the compound creates a powerful, figurative sense of complete negation, literally meaning "not even a tiny bit" and thus conveying an absolute sense of "not at all". This is a natural linguistic process of compounding for emphasis, where the concrete image of an极小量 (extremely small quantity) is used to intensify and completely negate the possibility of something.