Nonchalant

Definition: calmly unconcerned; unexcitable; centered

Derivation: French, “not concerned”

Familial Quality: cool

Quotes:
• Nonchalant putts count the same as chalant putts. — Henry Nichols Beard (1945-) American humorist
• Let your soul stand cool and composed before a million universes. — Walter “Walt” Whitman (1819–1892) American poet & essayist