impregnable (English)

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impregnable

Adjective

immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"

Synonyms:

• impregnable
• inviolable
• secure
• strong
• unassailable
• unattackable

Adjective

capable of conceiving

Synonyms:

• conceptive
• impregnable

Adjective

incapable of being overcome, challenged or refuted; "an impregnable argument"; "impregnable self-confidence"

Synonyms:

• impregnable
• inexpugnable