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unassailable

unassailable

11 8.0
So strong that no one can attack, defeat, or prove it wrong
  • adjective
  • /ˌʌnəˈseɪləbəl/
translation icon : indiscutible
  • The scientist presented an unassailable argument that convinced everyone in the room.
  • unassailable evidence
  • unassailable logic
  • unassailable position

Deductive reasoning is unassailable when the premises are actually true.

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Examples

  • Our complacent assumptions about the unity of American culture were shattered by the unassailable realities of difference.

    Academic text (1998)
  • Your book, Mr. Murray, is going to be an unassailable... contribution to English scholarship.

  • All that matters is power and the unassailable might of money.

  • No, but then again, it's never been in an unassailable position inside or outside of the academy.

    Academic text (2011)
  • Your position in this firm is not unassailable.

  • Today, there is even the possibility... that an unassailable base could be established on the Moon... to control world peace.

  • Transformation seemed out of the question; the current system is unassailable.

    Academic text (2007)
  • The logic seems unassailable: nurses are professionals who understand the importance of administering medications as ordered.

    Academic text (2001)
  • Advances in medicine are among the most universally acknowledged, appreciated, and unassailable benefits of technological progress.

    Academic text (2001)
  • Although Juba's reputation for bravery is unassailable, he does not glamorize war as a bid for manly valor.

    Academic text (2009)

Synonyms

invincible
vsunassailable
92 6.5

Too strong to be defeated

covers the same strength but also resists questioning or doubt
unbeatable
vsunassailable
30 3.4

Very hard to beat in a contest, like a team or player

adds inability to be criticized or disputed as well as not beaten
untouchable
vsunassailable
26 7.1

Too powerful for people to criticize or harm

matches that immunity but is framed as impossible to be challenged
bulletproof
vsunassailable
21 5.8

Hard to prove wrong

is broader, meaning it cannot be attacked or defeated generally
ironclad
vsunassailable
15 7.4

Very strict and impossible to change

is wider, applying to any target that cannot be challenged
incontrovertible
vsunassailable
  • Formal
11 8.2

Clearly true and impossible to doubt

is similar but also implies safety from attack or defeat
impregnable
vsunassailable
10 7.9

Too strong and well protected for anyone to capture or defeat

includes the same defence but also cannot be disputed verbally
unshakable
vsunassailable
  • US
8 4.8

Very strong belief or feeling that cannot be changed

includes that firmness but also covers being beyond attack or challenge
inviolable
vsunassailable
  • Formal
5 8.6

Too important or sacred to be broken

is about being beyond attack or dispute rather than sacredness
unconquerable
vsunassailable
4 7.3

Too strong for anyone to defeat

also resists being doubted or successfully questioned by critics
insuperable
vsunassailable
  • Formal
2 9.1

So hard that no one can get past it

focuses less on obstacles and more on being beyond challenge
inarguable
vsunassailable
2 6.7

Impossible to deny or argue with

also means it cannot be attacked or overcome in other ways
undefeatable
vsunassailable
2 4.9

Too strong for anyone to beat

also cannot be questioned or successfully challenged by argument
watertight
vsunassailable
1 5.1

So strong and complete that people cannot prove it wrong

is similar but also covers physical or direct attack resistance
unarguable
vsunassailable
1 5.9

Impossible to disagree with because the facts are clear

adds resistance to physical or forceful defeat as well as dispute
indubitable
vsunassailable
  • Formal
1 8.7

Completely certain and clearly true

also covers being immune to attack or successful challenge
unchallengeable
vsunassailable
1 7.2

So certain that no one can doubt it

is broader, including inability to be physically attacked or overcome
unhittable
vsunassailable
1 7.3

Very hard to defeat in a competition or argument

is absolute in resisting both attack and doubt rather than just hard
undisputable
vsunassailable
1 4.7

Certain and impossible to doubt

extends that certainty to include resistance to attack or defeat
unvanquishable
vsunassailable
9.9

Cannot be defeated

extends that immunity to verbal or logical challenge too
inexpugnable
vsunassailable
9.9

No one can beat or prove it wrong

is broader, stressing both physical defeat and being unquestionable
unattackable
vsunassailable
8.6

Others cannot attack or harm it

covers that protection but emphasizes inability to be questioned too
incontestible
vsunassailable
  • UK
8.4

Impossible to argue against because the facts are clear

is similar but also includes immunity to direct attack or defeat
uncontestable
vsunassailable
6.6

Clearly true and impossible to doubt

adds that it also cannot be attacked or defeated in other ways
irrefragable
vsunassailable
  • Archaic
9.9

Impossible to prove wrong

is broader, applying beyond arguments to attacks and defeats
undoubtable
vsunassailable
6.8

Certain and clearly true

is wider, adding that it cannot be successfully challenged or attacked
unopposable
vsunassailable
8.3

Impossible to resist or argue against

is similar but stresses not being subject to doubt or dispute

Antonyms

1 7.7

Open to attack, harm, or strong criticism

How Unassailable

impregnable
10 7.9
unassailable
11 8.0
secure
318 3.2
defensible
19 5.5
vulnerable
581 4.0

Surface Forms

unassailable positive

Morphology

unassailable = assailable (transparent) = un + assail + able

Formed by straightforward negation (un-) of the adjective 'assailable', so the relation is clear to learners who know 'assail' or 'assailable'.

Etymology

Unassailable comes from the prefix un- meaning 'not' and the root assail, from an old Latin word that meant 'to jump at' or attack, and you can see the same idea in assault. So unassailable literally means 'not able to be jumped at', which is why it describes something that cannot be attacked, questioned, or defeated.