Where does “underpromise” come from?

underpromise (English) comes from English promise, from Middle English promis, from Old French promesse, from Medieval Latin promissa, from Latin prōmissum, from Latin promissus, from Latin prōmittō, from Latin prō — to fit, to fix, to put together.

underpromise (English): To promise less than one expects to do

Definitions

  1. To promise less than one expects to do

Ancestry of “underpromise”, step by step

underpromise traces back through two separate lines of ancestry.

via English promise

StepLanguageWordMeaning
1Englishpromisean oath or affirmation; a vow; a transaction...
2Middle Englishpromis
3Old Frenchpromessepromise
4Medieval Latinpromissa
5Latinprōmissumpromise
6Latinpromissuspromised
7Latinprōmittōto send forth
8Latinprōfor
9Latinratusconsidered, having been considered; established,...
10Latinrēōrto reckon, calculate
11Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
12Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
13Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr
underpromise — Etymology, Origin & Word History | Etymology Explorer