unzweifelbar

Unzweifelbar is a German adjective meaning unquestionable, indisputable, or beyond doubt. It is used to describe statements, conclusions, or facts regarded as entirely certain and not open to reasonable dispute. In English, it is commonly translated as indubitable or undeniable.

The word is formed from un- (negation) + Zweifel (doubt) + -bar (capable of). The construction reflects a standard pattern in German for adjectives describing the reliability of a claim. It appears in formal writing, journalism, and academic prose, where a high degree of certainty is being asserted.

Usage notes: Unzweifelbar tends to strengthen a claim and is often positioned before the main predicate, as in “Es ist unzweifelbar, dass …” It can be used with nouns or clauses. The expression conveys certainty but does not replace evidence or argument; overuse may appear rhetorical.

Synonyms include unbestreitbar, zweifellos, eindeutig, and unstrittig. Nuances differ: unzweifelbar emphasizes the nonexistence of reasonable doubt, while zweifellos stresses the absence of any doubt, and unbestreitbar highlights that opposing arguments cannot be successfully challenged.

See also: Duden; Etymology of Zweifel; German adjectives with the -bar suffix.