4 Inflectional or Derivational?
What is the area of the semicircle?
"semi" is a DERIVATIONAL affix meaning 'half', it changes the meaning of the word (picture a circle and a semicircle - different!)
I think it's annoying when someone interjects when I'm talking.
"inter" is a DERIVATIONAL affix meaning 'between'. It changes the meaning of the root 'ject' which means "to throw"
That was the hardest test ever!
"-est" is an INFLECTIONAL affix making the root superlative