Nihilism (noun)

A philosophy or attitude characterized by the rejection of all religious and moral principles, often in the belief that life is meaningless.

Origin:

From latin nihil "nothing", from the root of ne- "not" + hilum "anything".

Examples:

1. He was a nihilist who believed that life had no purpose.
2. The novel was criticized for its nihilistic worldview.
3. The nihilism of the character was evident in his actions.
4. Political nihilism is the rejection of all political beliefs.
5. Nihilism is often associated with Friedrich Nietzsche's philosophy.