Where does “monster-in-law” come from?

monster-in-law (English) comes from English monster, from Middle English monstre, from Old French monstre, from Latin mōnstrum, from Proto-Italic monestrom.

monster-in-law (English): A very unpleasant mother-in-law

Definitions

  1. A very unpleasant mother-in-law

Ancestry of “monster-in-law”, step by step

monster-in-law traces back through two separate lines of ancestry.

via English monster

StepLanguageWordMeaning
1EnglishmonsterA terrifying and dangerous creature; A bizarre or...
2Middle EnglishmonstreA monster or beast; a horrific or frightening...
3Old Frenchmonstremonster
4Latinmōnstruma divine omen indicating misfortune, an evil omen, portent
5Proto-Italicmonestrom

via English mother-in-law

StepLanguageWordMeaning
1Englishmother-in-lawThe mother of one's spouse; A mother-in-law...
2Middle Englishmoder in lawemother-in-law
Every word from Proto-Italic monestromEvery word from Latin mōnstrumEvery word from Old French monstre
monster-in-law — Etymology, Origin & Word History | Etymology Explorer