Final answer:
An affix is a word part that is added to either the beginning or the end of a base word to alter its meaning. It encompasses both prefixes and suffixes.
Step-by-step explanation:
The definition of an affix is a word part added to the beginning or end of a base word to change its meaning. An affix can be a prefix, which is added to the beginning of a word, or a suffix, which is added to the end. For example, in the word 'digestion,' 'di-' is a prefix, 'gest' is the base, and '-ion' is a suffix. Understanding affixes is crucial for mastery in subjects like etymology and grammar within the English language.
An affix is a word part that is added to the beginning or end of a word. It can change the meaning or function of the word. For example, in the word 'unhappiness,' the prefix 'un-' is an affix that means 'not.' In the word 'teacher,' the suffix '-er' is an affix that indicates a person who performs the action of the verb 'teach.'