unassailable

adjective

un·​as·​sail·​able ˌən-ə-ˈsā-lə-bəl 

: not assailable : not liable to doubt, attack, or question

an unassailable argument

an unassailable alibi

unassailability

ˌən-ə-ˌsā-lə-ˈbi-lə-tē 

noun

unassailableness

ˌən-ə-ˈsā-lə-bəl-nəs 

noun

unassailably

ˌən-ə-ˈsā-lə-blē 

adverb

Synonyms

• hallowed
• holy
• inviolable
• sacred
• sacrosanct
• untouchable

Examples of unassailable in a Sentence

one of the unassailable beliefs of that political party

Recent Examples on the Web

Mathematical confirmation The 1-0 victory over Genoa on Sunday catapulted Como into 11th place, 17 unassailable points above the drop zone with 12 points left to play for. —David Ferrini, Forbes.com, 27 Apr. 2025

For four episodes, Good American Family is a tragic story of a woman fighting for her life against an unassailable evil, and nobody believes her. —Barry Levitt, Time, 9 Apr. 2025

Pera’s win gave Lindsay Davenport’s inexperienced side an unassailable 2-0 lead in the weekend’s final Group C tie and booked them a place at September’s Billie Jean King Cup Finals in Shenzhen. —Manasi Pathak, Forbes.com, 14 Apr. 2025

As always, this list is purely scientific and unassailable. —Tim Grierson, Vulture, 4 Feb. 2025

Word History

First Known Use

1596, in the meaning defined above

Rhymes for unassailable

• available
• unsalable
• bailable
• mailable
• salable
• saleable
• scalable
• bioavailable
• unavailable

Kids Definition

unassailable

adjective

un·​as·​sail·​able ˌən-ə-ˈsā-lə-bəl 

: not assailable : not open to doubt, attack, or question

unassailably

-blē 

adverb