1. Incapable of being overcome or subdued
   - invincible, unbeatable

See also: unconquerable

• unvitrified
• unvoiced
• unvoluntary
• unvulcanised
• unvulcanized
• unwanted
• unwantedly
• unwarily
• unwariness
• unwarmed
• unwarrantable
• unwarrantably
• unwarranted
• unwary
• unwashed
• unwatchful
• unwavering
• unwaveringly
• unwaxed
• unweaned
• unwearable
• unwearied
• unweary
• unwearying
• unweathered