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Open the tool →睹影知竿 (dǔ yǐng zhī gān) is a Chinese idiom (chengyu) meaning “to infer the true nature or full scope of something from its indirect signs or partial manifestations; to deduce the whole from a part or the substance from its shadow”.
睹影知竿 is pronounced dǔ yǐng zhī gān in Mandarin Chinese.
Literally, 睹影知竿 means “to see the shadow and know the rod”. It is used to mean “to infer the true nature or full scope of something from its indirect signs or partial manifestations; to deduce the whole from a part or the substance from its shadow”.
睹:见;竿:竹竿。看见竹竿的影子就知道竹竿的长短曲直。比喻从侧面烘托可以显示事物