The given question tests your understanding of word similarity and differences based on meaning and usage. The task is to identify which word among the options doesn't belong within the group due to a differing meaning or context.

1. The words to analyze are: Calm, Quiet, Peace, Serene, and Quite.
2. By inspecting the meaning of each word:
   • Calm: Free from disturbance; peaceful. It indicates a state of tranquility.
   • Quiet: Making little or no noise; silent or still.
   • Peace: Freedom from disturbance; a state or period in which there is no war or a war has ended. It aligns with the idea of calmness and serenity in life.
   • Serene: Calm, peaceful, and untroubled; tranquil.
   • Quite: This word usually denotes an adverb indicating 'to a certain or significant extent or degree; fairly.' It does not fit within the context of calmness or peace.
3. From the descriptions provided, it's clear that the words Calm, Quiet, Peace, and Serene relate to emotions or states of peacefulness and tranquility.
4. However, Quite stands out as it does not fit the theme of calmness or serenity; rather, it usually modifies the extent of an adjective or another adverb.

Conclusion: The word that does not belong to the group is Quite because it is an adverb focusing on degree rather than a noun or adjective denoting a peaceful state.