殚是一个中国汉字，读音为dān，形声。从歹，从单，单亦声。“歹”指“割肉裂骨”，“单”意为“大力”。“歹”与“单”联合起来表示“用力到极致”。本义：（气力）用尽、竭尽。
殚精竭虑 Taken great care
迭板殚簧 laminated spring ; lamellar spring
剪切殚性模量 shearing modulus ; modulus of rigidity
殚思极虑 rack ones brains ; s brains ; rack one's brains
殚闷 to lose consciousness ; to swoon ; to faint
殚心 to devote one's entire mind
殚残 to destroy
殚竭 to use up
阑殚 tired and exhausted
两边殚思极虑 Security and comfort into account
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