(idiomatic) To pursue something illusory, impractical, or impossible.

A person from the western part of Britain, a Welsh or Cornish person, especially (historical) the western Britons who resisted the 5th-century Anglo-Saxon invasion.

Having the mean (see noun below) as its value; average. / (obsolete) Middling; intermediate; moderately good, tolerable.

simple past tense and past participle of sit by