Where does “promisor” come from?

promisor (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.

promisor (English): One who engages or undertakes; a promiser

Definitions

  1. One who engages or undertakes; a promiser

Ancestry of “promisor”, step by step

promisor 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 ‐or

StepLanguageWordMeaning
1English‐orCreates an agent noun, often from a verb, indicating a person or object (often machines or parts of them) that do the verb or part of speech with which they are formed
2Middle English-our
3Old French-eorAlternative form of -or
4Latin-ator-ator, -er; second-person singular future passive...
5Latin-tor-er
6Proto-Italic-tōrForms agent nouns to verb stems
7Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
8Proto-Indo-European-tor-s
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr