The reference of a word to a thing outside the language is ( ) a

The reference of a word to a thing outside the language is ( ) and conventional.
【正确答案】：ARBITRARY
【题目解析】：题干译文：词对语言以外的事物的指称是什么样的和约定俗成的？The reference of a word to a thing outside the language is arbitrary and conventional. 答案为arbitrary。