Morpheme Segmentation and Function

1. Two Functions of Affixes: An Introduction

In the last lesson, we saw that bound morphemes like un-, -ness, -er, and -s must attach to a base. While they are all "bound," they don't all do the same kind of work. Some create entirely new words with new meanings, while others simply tweak a word to fit into a sentence correctly. These two functions are known as derivation and inflection.

The following video provides an excellent introduction to this core distinction.

2. Derivational Morphemes: Creating New Words

Let's start with the "strong change" morphemes. Derivational morphemes are used to derive new words from existing ones. When you add a derivational affix, you create a new lexeme (a new dictionary entry). This process often, but not always, changes the word's part of speech (or lexical category).

Key characteristics of derivational morphemes:

• Create new lexemes: teach (a verb) and teacher (a noun) are two different words.
• Can change the part of speech:
  • Verb to Noun: agree + -ment → agreement
  • Noun to Adjective: sun + -y → sunny
  • Adjective to Noun: happy + -ness → happiness
• Can change meaning without changing part of speech:
  • order (verb) + re- → reorder (verb)
• Can be prefixes or suffixes in English (e.g., re-, un-, -ment, -ness).
• Tend to be less productive: A given derivational affix can only attach to a limited set of bases. For example, the suffix -th (as in width, length) applies to only a handful of adjectives.

3. Inflectional Morphemes: Adjusting for Grammar

Now for the "wimpy change" morphemes. Inflectional morphemes do not create new words. Instead, they produce different forms of the same word to express grammatical information required by the syntax of a sentence.

Key characteristics of inflectional morphemes:

• Create different forms of the same lexeme: cat and cats are both forms of the lexeme CAT.
• Do not change the part of speech: walk (verb) and walked (verb) are both verbs.
• Add grammatical information: such as tense, number, possession, or comparison.
• Are always suffixes in English.
• Are highly productive: They apply to nearly all members of a given word class (e.g., the plural -s can be added to almost any noun).
• Represent a closed class: Modern English has only eight inflectional suffixes.

Here is the complete list for your reference:

This finite list is a powerful analytical tool. If an affix is not on this list, it must be derivational.

4. The Complete Picture

Let's visualize how these new categories fit with what you learned in the last lesson. The following diagram shows a complete classification of morpheme types.

5. The Order of Affixation

When a word has both derivational and inflectional affixes, there is a strict order of application. This is a structural rule that is very helpful in analysis.

As the text explains, the rule is simple: derivational affixes are applied to the root first, and inflectional affixes are added last. They always appear on the "outside" of a word.

Think of it as a sequence of function applications, where the root is the initial input:
Inflection( Derivation( ... Derivation( Root ) ... ) )

Consider the word de-person-al-iz-ed:

1. Root: person (Noun)
2. Derivation 1: person + -al → personal (Adjective)
3. Derivation 2: de- + personal → depersonal (Adjective)
4. Derivation 3: depersonal + -ize → depersonalize (Verb)
5. Inflection: depersonalize + -ed → depersonalized (Verb, past tense)

You cannot form *de-person-al-ed-ize. The inflectional morpheme (-ed) must come at the very end.

6. Practice Analysis

Now it's your turn to apply these concepts. For each word below, perform a full morphological analysis.

1. Segment the word into its morphemes.
2. Create a table identifying each morpheme's type (root/affix), classification (free/bound), and function (derivational/inflectional).

Words for analysis:

1. unbelievably
2. modernized
3. friendships
4. reconstructions

Conclusion

In this lesson, you've added a crucial functional dimension to your understanding of morphology. By distinguishing between derivational and inflectional processes, you can now perform a much more detailed analysis of word structure.

Key Takeaways:

• Derivational morphemes create new words (lexemes), can change the part of speech, and include both prefixes and suffixes.
• Inflectional morphemes create new forms of the same word, add grammatical information, do not change the part of speech, and are limited to a closed set of 8 suffixes in English.
• The order of affixation is systematic: Root → Derivational Affixes → Inflectional Affix.

Preview of the Next Lesson:
We have now completed our foundational module on linguistic analysis, covering the essentials of phonology and morphology. You are now equipped with the tools to analyze the form of language. In our next module, we will begin our study of historical linguistics proper by examining the fundamental mechanisms of sound change. You will learn to classify different types of sound changes, which is the first step toward understanding how languages diverge from a common ancestor.