Derivation is the formation of a new word or inflectable stem from another word or stem. It typically occurs by the addition of an affix.
The derived word is often of a different word class from the original. It may thus take the inflectional affixes of the new word class.
In contrast to inflection, derivation:
Kindness is derived from kind.
Joyful is derived from joy.
Amazement is derived from amaze.
Speaker is derived from speak.
National is derived from nation.
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