Grammarians insist that a word be a ( ) form that can function i

Grammarians insist that a word be a ( ) form that can function in a sentence.
【正确答案】：FREE
【题目解析】：According to semanticists, a word is a unit of meaning. Grammarians, however, insist that a word be a free form that can function in a sentence.语义学家们认为，词是一个意义单位，而语法学家们则认为， 词是句子中能起作用的一个自由形式。free form：自由形式；semanticist：语义学家；grammarian：语法学家