The word quit is used to express the act of leaving or stopping something, often a job or a habit. It usually implies a final or complete end to an activity. Because it is a verb, quit will often be seen with a direct object that specifies what is being quit.

The word quite is an adverb used to modify adjectives or other adverbs, often to enhance or slightly modify the degree to which they apply. It is often used to express that something is to a significant extent but not completely. Quite can also be used to mean 'completely' or 'entirely,' depending on the context and the adjective that follows.

To summarize, quit is a verb meaning to stop or leave an activity or place, signifying a complete cessation. On the other hand, quite is an adverb that intensifies the description it modifies, often implying totality or a high degree. While they sound similar, their use in sentences is vastly different, with quit relating to actions and quite to descriptions and extent. Remembering their distinct functions will greatly reduce the chance of misuse.