Question

For which of the following do you need to change the final y to i before adding the suffix?

play + -er
enjoy + -ment
happy + -ness
say + -ing

Answer 1

Happy+-ness. It becomes happiness.

Answer 2

Happy + -ness

Step-by-step explanation:

The word "happy" is an adjective and it requires to change the final affix "y" when adding the suffix "-ness" to become the adjective into a noun.

So when we add the suffix "-ness" to an adjective like "happy" the word changes its category because it becomes a noun.