Where does “unforecast” come from?

unforecast (English) comes from English forecast, from Middle English forecast.

unforecast (English): Not having been forecast

Definitions

  1. Not having been forecast

Ancestry of “unforecast”, step by step

unforecast traces back through two separate lines of ancestry.

via English forecast

StepLanguageWordMeaning
1EnglishforecastTo estimate how something will be in the future;...
2Middle Englishforecast

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Middle English forecastEvery word from English forecast