yawn

nouns

an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom

"he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"

oscitance, oscitancy, yawn, yawning

utter a yawn, as from lack of oxygen or when one is tired

"The child yawned during the long performance"

yawn

is derived from

is derived from

is a type of (narrower)

draw air into, and expel out of, the lungs

"I can breathe better when the air is clean"; "The patient is respiring"

be wide open

"the deep gaping canyon"

gape, yaw, yawn