Where does “motormouth” come from?

motormouth (English) comes from English motor, from Middle English motour, from Latin motor, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

motormouth (English): One who talks very fast or incessantly; a chatty...

Definitions

  1. One who talks very fast or incessantly; a chatty...

Ancestry of “motormouth”, step by step

motormouth traces back through two separate lines of ancestry.

via English motor

StepLanguageWordMeaning
1EnglishmotorA machine or device that converts other energy...
2Middle Englishmotour
3Latinmotormover; that which moves something; first-person...
4Latin-tor-er
5Proto-Italic-tōrForms agent nouns to verb stems
6Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
7Proto-Indo-European-tor-s

via English mouth

StepLanguageWordMeaning
1EnglishmouthThe opening of a creature through which food is...
2Middle EnglishmouþAlternative form of mouth
3Old Englishmūþmouth, opening, door, gate
4Proto-West Germanic*munþmouth
5Proto-Germanicmunþazmouth
6Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...
Every word from Proto-Indo-European -tor-sEvery word from Latin -torEvery word from Latin motor
motormouth — Etymology, Origin & Word History | Etymology Explorer