If something is inexplicable, you cannot explain why it happens or why it is true.
例句
His behaviour was extraordinary and inexplicable...他的行为不同寻常,让人费解。For some inexplicable reason, the investors decided to pull out.由于某些无法说明的原因,投资商们决定撤出投资。
英汉词典释义
adv.
无法说明地;难以理解地;令人难以理解的是
Inexplicably, Mary said she loved John.真是不可思议,玛丽说她爱约翰。