Synonyms: strong-minded
Definition: marked by vigorous independence of thought and judgment
Similar words: independent
Definition: free from external control and constraint
Usage: an independent mind; a series of independent judgments; fiercely independent individualism
Synonyms: strong-minded, strong-willed
Definition: having a determined will
Similar words: unregenerate, obstinate, stubborn
Definition: tenaciously unwilling or marked by tenacious unwillingness to yield