Inflection/Derivation

Question 1

Derivation

Answer 1

The formation of a word by changing the form (word class/meaning) of the base or by adding affixes to it.

“hope” to “hopeful” (noun —> adj)
“happy” to “unhappy” (change meaning)
“sad” to “sadness” (adj—>noun)

Question 2

Inflection

Answer 2

The change in the form of a word to mark such distinctions as tense, person, number, gender, mood, voice, and case.

noun plural - cat, cats
past tense - we walk, we walked
comparatives - big, bigger, biggest