Morpheme (noun)

The smallest unit of meaning in a word, typically made up of one or more sounds or letters.

Origin:

From the greek morpheme, meaning "form" or "shape".

Examples:

1. The word "dogs" is made up of two morphemes "dog" and "-s".
2. The word "unhappy" is made up of three morphemes "un-", "happy", and "-y".
3. The word "pre-school" is made up of three morphemes "pre-", "school" and "-er".
4. The word "antidisestablishmentarianism" is made up of several morphemes.
5. Linguistics is the study of the structure of morphemes, words, phrases and sentences.