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Open the tool →以一知万 (yǐ yī zhī wàn) is a Chinese idiom (chengyu) meaning “to infer a great deal from a single instance”.
以一知万 is pronounced yǐ yī zhī wàn in Mandarin Chinese.
Literally, 以一知万 means “to know ten thousand from one; to infer many from one”. It is used to mean “to infer a great deal from a single instance”.
从了解一点到推知其他许多事物。