What does improbably mean?
“Improbably” is an adverb meaning in a way that is unlikely, unexpected, or astonishingly unusual. It is often used before adjectives such as “good,” “bad,” “successful,” or “high,” as in “an improbably successful launch.” The adverb can therefore describe either the manner in which something happens or the striking degree of a quality. In formal writing, it often conveys admiration, surprise, or mild disbelief: a result is so unusual that it seems almost impossible, yet it has nevertheless occurred. “Improbably” is distinct from the adjective “improbable,” although the two are closely related in meaning. It can be replaced by “surprisingly” or “remarkably” in suitable contexts, and in simpler wording by “very likely” or “in an unlikely way,” depending on the intended nuance.
adverbIn a manner that is unlikely or improbable; more than one would normally expect. It can also mean astonishingly or remarkably, especially when describing an unusually good, bad, or extreme result.
- In a manner that is unlikely or improbable; more than one would normally expect.
- To an unexpectedly striking or remarkable degree.
"The small team produced an improbably successful result."
"The actor improbably won the award on his first nomination."
"She improbably found the missing keys after searching the entire house."
An improbably good result is not merely good—it is good in a way that seems almost too fortunate to be ordinary.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does improbably come from?
The word comes from the Latin root probare, meaning “to test” or “to approve,” which developed through probus, “good” or “honest,” into probable, “likely” or “credible,” and its opposite improbable. The adverb “improbably” was formed by combining “im-” with “probably” and later came to carry the additional sense of “surprisingly” or “remarkably.” Related English forms include “probable,” “probability,” and “prove,” all reflecting the same Latin root.
Related word forms
How improbably is actually used
The word is formal in tone and commonly expresses surprise at an unusual result, often with a slightly humorous or admiring nuance. It is more idiomatic than “in an improbable way” but less direct than “surprisingly” in formal prose.
Easily confused with improbably
“Improbable” is usually an adjective describing something unlikely, whereas “improbably” is an adverb describing the manner or degree of an action or result.