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Definitions

unquestionable

[uhn-kwes-chuh-nuh-buhl] / ʌnˈkwɛs tʃə nə bəl /
ADJECTIVE
definite; beyond doubt
Synonyms
STRONGEST
absolute indisputable self-evident undeniable unequivocal unmistakable
WEAK
accurate authentic bona fide certain clear cold conclusive dependable down pat downright established faultless flat flawless for certain genuine incontestable incontrovertible indubitable irrefutable manifest no ifs ands or buts obvious pat patent perfect positive real reliable superior sure sure-enough true undisputable undoubted unimpeachable veritable well-founded well-grounded
Antonyms
STRONGEST
disputable indefinite uncertain unsure vague
WEAK
doubtful questionable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“It’s unquestionable that climate change and environmental impacts are impacting the speed and severity of which things change. ... Climate resilience has to be part of the conversation.”

From Los Angeles Times • Jan. 27, 2026

Yet it remains a mystery how a driver who was long famed for his adaptability, and whose talent and status is unquestioned and unquestionable, has failed to adapt to them.

From BBC • Dec. 11, 2025

No matter where people stand on Schulz’s point of view on comedy, his mark on pop culture with his punchlines has become unquestionable.

From Los Angeles Times • Mar. 4, 2025

His passion for theatre is unquestionable but his task in this job will be to champion other people’s work as well as his own.

From BBC • Sep. 13, 2024

This event, his first unquestionable success, was a signal triumph for Francis.

From "Double Helix" by James D. Watson