onomatopoopa
A word whose pronunciation imitates the motion or activity it is describing, suggesting its source. Examples include “yawn” and the archetype “poop.” The word is a synthesis of the Greek word "onoma" (name) and the English word "poop" (verb meaning "to defecate") thus onomatopoopa essentially means "poopy name."
Whenever I say yawn, it feels like a yawn and that's because it's an onomatopoopa.