What Is Syntax?

Syntax is the study of the order of morphemes. Because it governs how morphemes are combined, it is directly relevant to both semantics and morphology. The principle of compositionality holds that the meaning of a complex expression is a function of the meaning of its parts and the way they are combined. Since syntax is precisely the study of how those parts combine, it plays a decisive role in how complex expressions are interpreted.

This places syntax at the center of how language works. As Embick puts it, the primitive elements of language are morphemes, and the system responsible for combining morphemes into complex structures is the syntax. In other words, syntax is what organizes morphemes, and that organization is what allows complex structures to carry meaning.

Generative grammar

Any account of syntax has to name its framework. The most influential figure in the modern study of syntax is Noam Chomsky, often called the father of modern linguistics, who developed generative grammar. Generative grammar is the enterprise of specifying which sentences are grammatical on the basis of a limited set of rules. Because speakers can produce an infinite variety of sentences, this is no small task. Crucially, the project refers both to what is grammatical and to what is ungrammatical, since the rules must license some structures while ruling out others.

A simple example shows the point. In English we can say the cat and a cat, and we can pluralize to get the cats. But we never say a cats, with a plural noun after a. The fundamental question is why a cats counts as ungrammatical — why this combination of morphemes never appears in natural English. Answering questions of exactly this kind is the work of syntax. (By convention, linguists mark an ungrammatical string with a preceding asterisk.)

Syntax as a bridge

Andrew Carnie, in a well-known generative textbook, frames the discipline this way: syntax studies the level of language that lies between words and the meaning of utterances. It is the level that mediates between the sounds a speaker produces, organized into words, and what the speaker intends to say. As Grasso summarizes it, syntax is "a bridge between meaning and the sounds that we produce."

What makes this genuinely remarkable is not questions of etymology, punctuation, or supposed decline in usage, but the deeper puzzle of how speakers subconsciously get from sounds and words to meaning. That process is what syntax sets out to describe. There are many possible subfields within syntax; the emphasis here falls on how syntax interfaces with semantics — how structure produces interpretation.