inexpugnable

/in´eks pug´nǝ bǝl, -ik spug´-/adj.

● شکست ندادنی، منکوب نکردنی، تسلیم ناپذیر، سرسخت

adjective
1. Impregnable, unassailable, not to be taken by assault, not to be stormed, secure from capture, tenable against all odds.
2. Unconquerable, invincible, not to be subdued.
3. Incontrovertible, irrefragable, impregnable, unassailable, unanswerable.