The Collaborative International Dictionary
Disciplinable
Disciplinable \Dis"ci*plin*a*ble\, a. [Cf. F. disciplinable. See Discipline.]
Capable of being disciplined or improved by instruction and training.
Liable or deserving to be disciplined; subject to disciplinary punishment; as, a disciplinable offense.
Douglas Harper's Etymology Dictionary
disciplinable
mid-15c., from discipline + -able.
Wiktionary
disciplinable
a. 1 That can be instructed (by discipline); able to be taught. 2 (context obsolete English) Relating to discipline; disciplinary.