【正确答案】：
A BOUND ROOT IS THAT PART OF THE WORD THAT CARRIES THE FUNDAMENTAL MEANING JUST LIKE A FREE ROOT. 
【题目解析】：粘着词根是单词的一部分，它像自由词根一样承载着单词的基本意义。
A BOUND ROOT IS THAT PART OF THE WORD THAT CARRIES THE FUNDAMENTAL MEANING JUST LIKE A FREE ROOT.