Definition

Adjective 1. Impossible to overcome, defeat, or capture: Describes something that is so strongly established, defended, or reasoned that it cannot be successfully attacked, challenged, or taken. 2. Unassailable; irrefutable: Describes an argument, position, or belief that is so logically sound or well-supported that it cannot be disproven or refuted.

Usage and Examples

• The general considered the fortress to be inexpugnable due to its location and defenses.
• Her inexpugnable confidence allowed her to remain calm under intense criticism.
• The philosopher presented an inexpugnable argument that left his opponents with no logical rebuttal.

Advanced Usage

• Inexpugnable position: A stance or situation that is completely secure and cannot be undermined.
  • After the new evidence was revealed, the prosecution held an inexpugnable position.
• Inexpugnable belief: A conviction that is held with absolute certainty and is not subject to doubt.
  • His faith provided him with an inexpugnable belief in the ultimate good.

Variants and Related Words

• Inexpugnably (adverb): In a manner that cannot be overcome or refuted.
  • The theory was inexpugnably linked to the empirical data.

Synonyms

• Impregnable
• Unassailable
• Invincible
• Unbeatable
• Irrefutable

Antonyms

• Vulnerable
• Assailable
• Weak
• Refutable

Notes on Meaning

This is a formal and somewhat literary word. Its core meaning combines physical or metaphorical strength with the idea of being impervious to attack. While it can describe physical fortifications, it is more commonly used in modern English to describe abstract concepts like arguments, confidence, or logical positions.

Adjective

1. incapable of being overcome, challenged or refuted
   • an impregnable argument
   • impregnable self-confidence