"Inexpugnable" is a word in ENGLISH

inexpugnable ENGLISH
Definition:

Incapable of being subdued by force; impregnable;
unconquerable.

Few words of positivity

All are lunatics, but he who can analyze his delusion is called a philosopher.

Ambrose Bierce, The Collected Writings Of Ambrose Bierce

WORD SUGGESTIONS
Laugh your heart out.

Why didn't the monster use toothpaste? Because he said his teeth weren't loose.

impregnable ENGLISH

Not to be stormed, or taken by assault; incapable of being subdued; able to resist attack; unconquerable; as, an impregnable …

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invincible ENGLISH

Incapable of being conquered, overcome, or subdued; unconquerable; insuperable; as, an invincible army, or obstacle.

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unmasterable ENGLISH

Incapable of being mastered or subdued.

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