§ 2.2Module 2

Survey of English Morphology

On this page

Survey of English Morphology

Recall first

Analyze unhappiness and walked: identify a root/stem and the affixes, then decide which affixes are derivational or inflectional.

First principles

Morphology studies the internal structure of words and how word forms encode grammatical or lexical information. A morpheme is a minimal meaning- or function-bearing unit. A root is the central lexical element; a stem is the form to which an inflectional affix attaches; an affix can be a prefix, suffix, infix, or other operation. English is mostly concatenative, but spelling changes and irregular forms matter.

Inflectional morphology creates grammatical variants of the same lexeme. English examples include plural -s, past -ed, progressive -ing, comparative -er, and possessive -'s. It normally does not change the lexical category or core lexeme: walk → walked, cat → cats. It may express agreement, tense, aspect, number, or comparison.

Derivational morphology creates a new lexeme, often changes category or meaning, and is less governed by a fixed grammatical paradigm: happy → unhappy, happy → happiness, modern → modernize. Derivation can be productive but has lexical restrictions.

Worked analysis. unhappiness = un- + happy + -ness: un- reverses/negates a property and -ness derives a noun; this is derivation. walked = walk + -ed: a past-tense inflection of the verb. In studies, spelling y → ie accompanies plural or third-person singular morphology; surface strings are not always simple substring concatenations. went is an irregular inflection of go, showing why dictionaries or learned paradigms help.

Morphological analysis can output a structure such as walk+V+PAST; generation reverses that mapping subject to orthographic rules. Distinguish a morpheme boundary from a tokenizer boundary: unhappiness may be one token but three morphemes.

Exercise — reveal after answering

Is -er always inflectional in English?

Answer: No. taller is comparative inflection, but teacher is derivational (teach + agentive -er). Context and lexical analysis matter.

Exam lens

Use the tests cautiously: inflection preserves lexeme/category and expresses grammar; derivation creates a lexeme or changes meaning/category. Mention irregularity and spelling alternation as limitations of simple suffix rules.

Rapid revision checklist

Key takeaways

Sources