unconquerable

/ʌnˈkɑŋkərəbəl/
adjective
  1. Impossible to defeat or overcome.
    • Some mountains seem unconquerable, but climbers still try.
    • Her unconquerable spirit kept her going through the hardest times.
    • The army believed their fortress was unconquerable.
  2. Impossible to control or suppress.
    • The child's unconquerable curiosity led her to explore every corner.
    • They faced unconquerable obstacles in their attempt to reform the system.
    • He felt an unconquerable urge to laugh during the serious meeting.
Antonyms