instruction的词根

instruction的词根？

词根是instruct ，instruction中文意思是n. 用法说明；指示，吩咐；教授，指导；（计算机的）指令，命令；给初级律师（或辩护律师、陪审团）的指示

Two lawyers were told not to leave the building but no reason for this instruction was given.两位律师被告知不要离开这座建筑，但没被告知这一指示的原因。

instruct n 指导，教导(in进+struct→[把知识]建立进去→指导)

instruction n 教导，指导(in+struct+ion)