拉丁前缀inter-来自拉丁介词inter，意思相当于between或among。inter-本是原生词缀，它出现在从法语引进的拉丁词中。但是，现在它已成为英语的派生词缀，可以与不同语源的动词、名词相结合，表示between, mutually, mutual等意义。与动词结合时，是个副词性前缀，不改变词基单词的词性；与名词结合时， 它是形容词或介词性前缀。当它作为介词性前缀与名词结合时，可能改变词基的词性，生成形容词。的异体只能作原生词缀，出现在intellect等少数单词中。

先介绍原生前缀inter-与词根结合的几个例词。

intercede [ inter- = between 在...之间；ced =to go 走；-e=>“to go between two parties 在双方之间奔走”→]v. ask a favour from one person for another 代为请求，说情 / He did not dare to ask the teacher, so I interceded for him.他不敢向老师请求，所以我代为说情。

intercession n. 调解，说情 intercessor 调解者，说情者

interdict [ inter- = between 在…之间；dict = to speak 说=>“to speak between 在中间插话”→“to stop by speaking 发言制止”v. prohibit or forbid 禁止，制止 / He was interdicted from going abroad.他被禁止出国。

interdiction n. 禁止；制止 

interdictory a. 禁止的，制止的

interest [ inter- = between 在…之间；est = to be 存在 =>“to be between 身在其间” →“be concerned with or have a share in与…有关， 在…有一份”→]n. feeling of one concerned; share in sth. 关心， 兴趣；利益 / He has an interest in sports. 他对运动感兴趣。II vt. arouse feeling of wanting to know, etc. 使发生兴趣 / This new method will certainly interest you.这新方法肯定会引起你的兴趣。

interesting a. 有趣味的；引起兴趣的