British

UK: ˈbrɪtɪʃ | US: ˈbrɪtɪʃ

Definition
  1. adj. relating to Great Britain or its people, culture, or language

  2. n. (collectively) the people of Great Britain

Structure
Brit <Celtic tribe name>ish <adjective suffix>
Etymology

The term traces back to the Latin Britannia (land of the Britons), influenced by Old English Brettisc. The Celtic root Brit- originally denoted the indigenous people of the island. The suffix -ish (from Old English -isc) was later added to form the adjective, solidifying its modern meaning tied to national identity.

Examples
  1. The British Museum houses artifacts from around the world.

  2. She has a distinct British accent.

  3. British weather is famously unpredictable.

  4. The British are known for their love of tea.

  5. He studied British literature at university.