Synonyms of unforeseen

unforeseen

adjective

ˌən-fȯr-ˈsēn 

as in sudden

not expected

there are almost always unforeseen consequences for any major endeavor

unforeseen problems delayed the project beyond its deadline

Synonyms & Similar Words

• sudden
• unexpected
• unanticipated
• abrupt
• unlooked-for
• unlikely
• unintended
• unplanned
• improbable
• startling
• surprising

Antonyms & Near Antonyms

• anticipated
• foreseen
• expected
• predicted
• prophesied
• unsurprising

Example Sentences

Recent Examples of unforeseen

Arraez, 29, is in the midst of the most complete season of his career, a year made possible by his completely unforeseen improvement on defense. — Justice Delos Santos, Mercury News, 5 July 2026

The family visas, in particular, led to an unforeseen boom in immigration. — Albert Sun, New York Times, 2 July 2026

Legislators ordered the transit authority to complete at least 50% of the Red Line, which has been in the works for decades, before completing any other rail projects unless an unforeseen, extraordinary event upends the project. — Mary Ramsey updated June 30, Charlotte Observer, 30 June 2026

Bullard said meetings with the legislature will occur every 90 days and, if an unforeseen circumstance arises, the agency would have to enter into emergency appropriation conversations. — Jillian Taylor, StateImpact, 30 June 2026