Final answer:
The suffix is the word element that appears at the end of a word and can change its meaning or grammatical function.
Step-by-step explanation:
The suffix is the word element that appears at the end of a word. It is a meaningful group of letters that can change the meaning or the grammatical function of the word it is attached to. For example, in the word 'happiness,' the suffix '-ness' changes the adjective 'happy' into a noun.
Learn more about Suffixes in English words