Explanation:
These are foundational concepts in linguistics.

Phoneme: The smallest unit of sound that distinguishes one word from another (e.g., /p/ vs /b/ in 'pat' and 'bat'). It has no meaning by itself.
Morpheme: The smallest unit of meaning. It can be a whole word (free morpheme like "dog") or a part of a word (bound morpheme like "-s" in "dogs").

Detailed Topic Insight (Morphology):
Understanding morphology helps in teaching vocabulary.
- Bound Morphemes: Prefixes (un-, dis-) and Suffixes (-ed, -ing).
- Teaching Tip: When a student encounters a difficult word like "Unhappiness", help them break it into morphemes: Un- (not) + happy (base) + -ness (state of). This is "Morphological Analysis".

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