The Chinese idiom **微不足道** (wēi bù zú dào) is formed through a classical four-character structure where each component contributes to a layered, figurative meaning. Literally, **微** means "tiny," **不** is "not," **足** means "sufficient," and **道** means "to mention." Combined, they create a logical sequence: something is so insignificantly small (**微**) that it is not (**不**) sufficient (**足**) to be worth mentioning (**道**). This formation follows a common pattern in Chinese chengyu where the first two characters describe a state, and the last two, often in a "not enough to..." construction, provide a consequential judgment, resulting in the meaning "negligible" or "insignificant."