Final answer:
The word that contains a suffix is 'happiness' in English.
Step-by-step explanation:
The word that contains a suffix is happiness.
In this case, the suffix is -ness which changes the base word happy into a noun.
Other examples of words with suffixes include reverse with the suffix -verse, prewrite with the suffix pre-, and disbelief with the suffix -belief.
Learn more about Suffixes in English