Answer:
The words which contain affixes are the following ones:
unhappy
reread
restless
comfortable
Step-by-step explanation:
Affixes are the category to which both prefixes and suffixes belong. We use affixes when we want to add a certain meaning to a word (a verb, a noun or an adjective):
Adjective "happy" + prefix "un"= unhappy (the prefix implies "not happy").
Verb "read" + prefix "re"= reread (the prefix implies repetition).
Verb "rest" + suffix "less"= restless (the verb is modified by the suffix, and the word becomes an adjective that carries the idea of denial: someone who does not rest).
Abstract noun "comfort" + suffix "able"= comfortable (the noun is modified by the suffix and becomes an adjective: an object or a place that offers comfort).