Unassailable
adj.capable, resilientformal
Meaning 1
So well founded that criticism or denial cannot reasonably defeat it.
Reach for it when Praising an argument, conclusion, or reputation with exceptionally strong support.
The audit provided an unassailable case for replacing the failing alarms.
Choose between these
3- professional
conclusive
proof settles the question
not when does not mean immune from criticism generally
- professional
reasoning has no exploitable gap
not when too conversational for solemn moral praise
- formal
irrefutable
evidence defeats every reasonable objection
not when not for a protected place or commanding lead
Meaning 2
Secure against attack, intrusion, or capture.
Reach for it when Describing a physical or competitive position that opponents cannot reach.
The early lead looked unassailable once the final climb began.
Choose between these
3- everyday
safety from loss or attack is enough
not when weaker than absolute invulnerability
- formal
nothing can cause meaningful harm
not when not when defenses are merely very strong
- literary
a position cannot be breached
not when overdramatic for an ordinary advantage
Said against
3- disputable
- flawed
- vulnerable
It naturally appears in
3- unassailable evidence
Unassailable evidence linked the leak to a cracked inlet.
- unassailable reputation
Years of transparent decisions built her unassailable reputation.
- unassailable lead
A brilliant final relay gave the school an unassailable lead.
Where this comes from
- wiktionary, adjective figurative: impossible to dispute opens in a new tab for meaning 1 · retrieved 2026-07-26
- wiktionary, adjective literal: unable to be attacked successfully opens in a new tab for meaning 2 · retrieved 2026-07-26
The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.