left imagination (adjective) unsaid: not expressed or partially expressed
Sinonime: bulletproof, impassable, impregnable,
indomitable, insuperable, inviolable, invulnerable,
irresistible,
powerful,
strong, unassailable, unattackable, unbeatable, unconquerable, undefeatable, unsurmountable,
untouchable,
unyieldingAntonime: beatable, breakable, conquerable, destructible