root

root
【正确答案】：A root is often seen as part of a word ;it can never stand by itself although it bears clear definite meaning; it must be combined with another root or an affix to form a word, for example, “liter-”in the word “literal”.
【题目解析】：词根通常被视为单词的一部分，它永远不能独立存在。虽然它有明确的含义，但必须与另一个词根或词缀结合形成一个词，例如“literal”一词中的“liter-”。