Construction Grammar

Idioms and collocations are part of lexical phrases which are of high importance in lexicography. One of the criteria for distinguishing these two types of phrases from each other is the inflexibility of their constituent elements. Idioms, unlike collocations, are not flexible in terms of word order and are always used in a fixed and specific form. The purpose of the present article was to show firstly whether all Persian idioms are inflexible against syntactic changes or some are flexible; secondly, to indicate how a new lexical phrase is created as a result of converting an idiom into a collocation. To illustrate this phenomenon, a new and practical definition for idioms and collocations, based on syntactic criteria not merely semantic, was provided. According to Construction Grammar, idioms were analyzed based on four syntactic tests: ‘passivization’, ‘clefting’, ‘dislocation’, and ‘interrogation’. Two hundred idioms were collected from two of the most up-to-date and comprehensive sources, namely Farsi Amiyaneh Dictionary (Abolhassan Najafi, 2008) and the two-volume Dictionary of Kenayat-e Sokhan (Hassan Anvari, 2019). Some idioms were flexible to syntactic changes, and behaved similarly to collocations. The flexibility of idioms led to introducing a new definition of these phrases based on syntactic criteria. Thus, such phrases were considered a kind of collocation, not an idiom. The result showed that converting an idiom into a collocation always creates a lexical phrase or lexeme with a new meaning. Finally, a plan was introduced to represent such idioms practically in Persian dictionaries.