Standard Lemma guide

unassailable

adj · noun · 6 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˌʌnəˈseɪləbl̩/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: AH2 N AH0 S EY1 L AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Secure against attack; impregnable.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Undeniable, incontestable or incontrovertible.

Definition source: English Wiktionary via Wiktextract

Usage: broadly

Examples

  • She won the debate with her unassailable logic.

Meaning relationships

Synonyms: incontestable, unopposable, impregnable, invulnerable

Antonyms: none provided

3

noun

Meaning 3

Something, such as a belief, that cannot be assailed.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adjective satellite

Meaning 4

without flaws or loopholes

Definition source: Princeton WordNet 3.0

Examples

  • an ironclad contract
  • a watertight alibi
  • a bulletproof argument

Meaning relationships

Synonyms: unshakable, watertight, bulletproof

Antonyms: none provided

5

adjective satellite

Meaning 5

impossible to assail

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: untouchable

Antonyms: none provided

6

adjective satellite

Meaning 6

immune to attack; incapable of being tampered with

Definition source: Princeton WordNet 3.0

Examples

  • an impregnable fortress
  • fortifications that made the frontier inviolable
  • a secure telephone connection

Meaning relationships

Synonyms: impregnable, inviolable, secure, strong, unattackable

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English assailable English unassailable From un- + assailable.

Across languages

Translations

24 source translations are retained for this English entry.

  • Bulgarian: непристъпен (nepristǎpen) — secure against attack; impregnable
  • Czech: nedobytný — secure against attack; impregnable
  • Dutch: onneembaar — secure against attack; impregnable
  • French: inattaquable — secure against attack; impregnable
  • French: inexpugnable — secure against attack; impregnable
  • German: unangreifbar — secure against attack; impregnable
  • Russian: неприступный (nepristupnyj) — secure against attack; impregnable
  • Spanish: inexpugnable — secure against attack; impregnable
  • Bulgarian: неопровержим (neoproveržim) — undeniable, incontestable or incontrovertible
  • Czech: apodiktický — undeniable, incontestable or incontrovertible
  • Czech: nenapadnutelný — undeniable, incontestable or incontrovertible
  • Dutch: onaantastbaar — undeniable, incontestable or incontrovertible
  • Dutch: onbetwistbaar — undeniable, incontestable or incontrovertible
  • French: indéniable — undeniable, incontestable or incontrovertible
  • French: incontestable — undeniable, incontestable or incontrovertible
  • German: unanfechtbar — undeniable, incontestable or incontrovertible
  • Irish: do-ionsaithe — undeniable, incontestable or incontrovertible
  • Irish: dosháraithe — undeniable, incontestable or incontrovertible
  • Irish: dobhréagnaithe — undeniable, incontestable or incontrovertible
  • Macedonian: неприкосновен (neprikosnoven) — undeniable, incontestable or incontrovertible
  • Polish: bezsporny — undeniable, incontestable or incontrovertible
  • Portuguese: incontestável — undeniable, incontestable or incontrovertible
  • Russian: неопровержи́мый (neoproveržímyj) — undeniable, incontestable or incontrovertible
  • Spanish: incontestable — undeniable, incontestable or incontrovertible