We found 2 dictionaries that define the word unprobable:

General (2 matching dictionaries)

1. unprobable: Merriam-Webster
2. unprobable: Wiktionary

Definitions from Wiktionary (unprobable) ▸ adjective:  (archaic) Improbable; unlikely. ▸ Words similar to unprobable ▸ Usage examples for unprobable ▸ Idioms related to unprobable ▸ Wikipedia articles (New!) ▸ Popular nouns described by unprobable ▸ Words that often appear near unprobable ▸ Rhymes of unprobable ▸ Invented words related to unprobable