Definition of "unmastered" [unmastered]

• Not subdued; not conquered.
• Not conquerable.

The Century Dictionary (Public Domain)

• "And Lina, Sorrow, and Florens know that if their mistress dies, "three unmastered women … out here, alone, belonging to no one, became wild game for anyone" (page 58)."
• "They absorbed and spit back all the directionless anger, unmastered aggression and awe that rolled over them from the fist-pumping crowd."
• "Korra, a member of the Southern Water Tribe, is already the Avatar when the series starts and has mastered three of the four elements, leaving only airbending unmastered."