adjective
Definition: Describing something that has been modified by adding a postfix, which is a group of letters added to the end of a word.
Example: The term 'unhappiness' is an example of a postfixed word, where 'un' is added to the root 'happy'.
verb
Definition: To add something at the end of another thing, especially in a grammatical or mathematical context.
Example: The teacher postfixed the explanation with an example to clarify the concept.