Main entry: unregenerate, obstinate, stubborn
Definition: tenaciously unwilling or marked by tenacious unwillingness to yield
Antonyms: docile
Definition: willing to be taught or led or supervised or directed
Antonyms: undetermined
Definition: not yet having been ascertained or determined
Definition: shed at an early stage of development
Main entry: refractory, stubborn
Definition: not responding to treatment
Usage: a stubborn infection; a refractory case of acne; stubborn rust stains
Antonyms: manipulable, tractable
Definition: easily managed (controlled or taught or molded)