improbable

After another bungled team performance from McLaren, Max Verstappen is now within reach of what seemed to be an improbable fifth consecutive drivers' world championship.

A U.S. ground invasion is improbable, according to many analysts.

Which seems improbable to me, at least in the short term.

When the researchers compared all mathematically possible combinations of Theia and early Earth compositions, they found that some outcomes were highly improbable.

Mamdani has seized on that to power an improbable rise, profiting from an affiliation with socialist politics that might otherwise have held him back.