Source : Webster's Revised Unabridged Dictionary (1913)

Ungovernable \Un*gov"ern*a*ble\, a.
   Not governable; not capable of being governed, ruled, or
   restrained; licentious; wild; unbridled; as, ungovernable
   passions. -- {Un*gov"ern*a*bly}, adv. --Goldsmith.