Synchronic vs. Diachronic Linguistics

1. Two Ways of Looking at Language

At its core, the study of language can be approached from two different temporal viewpoints. One looks at a language as a complete, functional system at a single point in time, while the other looks at how a language has changed and evolved through history.

To get a clear overview of these two approaches—synchronic and diachronic—please watch the following video. It provides clear definitions and several useful examples.

2. Solidifying the Concepts

As the video explained, the distinction is about the dimension of time:

• Synchronic Analysis: This is the study of a language at a specific, fixed point in time. It's like taking a snapshot. The goal is to describe how the language functions as an interconnected system at that moment, without regard for its past or future. The term comes from Greek: syn- ("together") and chronos ("time").
• Diachronic Analysis: This is the study of a language as it changes through time. It's like watching a movie. This is the essence of historical linguistics. The term comes from Greek: dia- ("through") and chronos ("time").

Given your background in software engineering, you might find this analogy helpful:

• A synchronic analysis is like checking out a single commit from a Git repository. You are examining the entire state of the codebase at that specific point. You can analyze its architecture, dependencies, and component interactions, but you are not considering the history of changes that led to this state.
• A diachronic analysis is like using git log to view the history of commits or git diff to compare two different versions of the code. You are explicitly studying the evolution of the codebase over time—what was added, removed, or refactored.

Your goal for this course—analyzing historical linguistic evolution—is fundamentally diachronic. However, as we will see, you cannot perform a diachronic analysis without first being able to conduct a synchronic one.

3. From Theory to Practice: Concrete Examples

Let's ground these concepts with some concrete linguistic examples. The following article provides several clear illustrations of the two approaches in action.

As the article illustrates, if we describe the grammar of Old English (around 900 AD), that is a synchronic study. If we then compare that grammar to the grammar of Modern English to document the changes in word order, that is a diachronic study.

Notice a crucial point: to study the change in word order, we must first have accurate descriptions of the word order at two different points in time. A diachronic analysis is built upon a series of synchronic snapshots.

4. The Origin of the Distinction: Ferdinand de Saussure

This fundamental distinction was formalized by the Swiss linguist Ferdinand de Saussure in the early 20th century. His work laid the foundation for modern linguistics. Understanding his reasoning provides valuable context for the entire field.

Saussure's key insight was that language is a system where everything holds together (un système où tout se tient). Before him, linguists were primarily focused on tracing historical changes, sometimes without a full appreciation for the internal logic of the language at any given stage. Saussure argued that to understand language change (diachrony), one must first understand language as a structured system (synchrony).

5. Check Your Understanding

Let's apply what you've learned. For each of the following research questions, would you classify the required analysis as primarily synchronic or diachronic?

1. What are the grammatical rules for using the subjunctive mood in modern Parisian French?
2. How did the pronunciation of words like knight and through (which once had a hard 'k' and a guttural 'gh' sound) evolve in English?
3. What are the different meanings of the word "silly" in Shakespeare's plays?
4. How did the meaning of the word "silly" change from "blessed/innocent" in Old English to "foolish" in Modern English?
5. What is the relationship between the Latin word for "head" (caput) and the French word for "head" (chef)?

Conclusion

In this lesson, we have established the foundational distinction between two modes of linguistic analysis:

• Synchronic analysis focuses on describing a language as a self-contained system at a single point in time. It's a static "snapshot."
• Diachronic analysis focuses on how a language changes and evolves over time. It's a dynamic "movie."

The main goal of this course is diachronic—to analyze language evolution. However, any rigorous historical analysis must be built on solid synchronic descriptions of the language states you are comparing.

In our next lesson, we will begin our first synchronic task. We will learn to identify and distinguish between phonemes, morphemes, and lexemes, the fundamental building blocks of language. This will give us the basic vocabulary needed to describe a language's structure at a single point in time, a necessary first step before we can begin to trace its history.