The smallest grammatical unit of a language; a word or meaningful part of a word.

Morpheme 

The meanings or interpretation of words and sentences in a 
language.

Semantics 

In linguistics, the context in which a speech sound is uttered.

Pragmatics

Syntax is the component of grammar that dictates the rules for organizing words into coherent and meaningful sentences.

Syntax

All human languages have similar basic elements, and each is composed of a 
set of sounds and symbols that have distinct meanings.

1. Phoneme
2. Morpheme
3. Semantics
4. Syntax
5. Pragmatics

University of Pittsburgh

Breedlove, S. & Watson, N. (2017). Behavioral neuroscience, eighth edition. Oxford University Press.

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