1. Unshaken in purpose
   "wholly undismayed by the commercial failure of the three movies he had made"
   - undaunted, unshaken

See also: resolute

• fourth cranial nerve
• Fourth Crusade
• fourth deck
• fourth dimension
• Fourth Earl of Chesterfield
• Fourth Earl of Orford
• fourth estate
• Fourth Lateran Council
• Fourth of July
• fourth part
• fourth power
• fourth stomach
• fourth ventricle
• fourth-year
• fourthly
• fovea
• fovea centralis
• foveal vision
• fowl
• fowl cholera
• fowl pest
• fowl run
• fowler
• fowling piece
• fox