Abstract This paper considers the interplay between arbitrariness and the widely-accepted ideals of one form, one meaning and compositionality. They are shown to operate in different domains, and to clash where there is idiomaticity. Idioms provide familiar forms which are not semantically relevant to the context. In effect, this creates homonymy, which goes against any trend towards pairing one form with one meaning. The conflict can be seen as tension between two more fundamental principles. Lack of motivation is considered in an Appendix on word-manufacture, where it is shown how slippery the notion of motivation can be.

中文翻译：

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任意性，动机和习语

摘要本文考虑了任意性与被广泛接受的一种形式，一种含义和组成性理想之间的相互作用。它们显示在不同的域中运行，并且在有惯用性的地方发生冲突。习语提供了与上下文在语义上不相关的熟悉形式。实际上，这会产生同名，这与将一种形式与一种含义配对的任何趋势背道而驰。冲突可以看作是另外两个基本原则之间的紧张关系。动机缺乏在词制造的附录中被考虑，在该附录中显示了动机的概念有多滑。