Where does “mouthbreathing” come from?

mouthbreathing (English) comes from English breathing, from English breathe, from Middle English brethen, from Middle English breth, from Old English brǣþ, from Proto-Germanic brēþiz, from Proto-Indo-European bʰrē-t-, from Proto-Indo-European bʰer- — to bear, carry.

mouthbreathing (English): The process of breathing through the mouth;...

Definitions

  1. The process of breathing through the mouth;...

Ancestry of “mouthbreathing”, step by step

mouthbreathing traces back through two separate lines of ancestry.

via English breathing

StepLanguageWordMeaning
1Englishbreathingpresent participle of breathe; The act of...
2EnglishbreatheTo draw air into (inhale), and expel air from (exhale), the lungs in order to extract oxygen and excrete waste gases
3Middle Englishbrethento breathe, blow, exhale, odour
4Middle Englishbrethbreath
5Old Englishbrǣþodor, scent, stink, exhalation, vapor
6Proto-Germanicbrēþizvapour; steam; breath; odour, smell
7Proto-Indo-Europeanbʰrē-t-exhalation from heat; steam
8Proto-Indo-Europeanbʰer-to bear, carry

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 bʰer-Every word from Proto-Indo-European bʰrē-t-Every word from Proto-Germanic brēþiz
mouthbreathing — Etymology, Origin & Word History | Etymology Explorer