Yawn (verb / noun) — يتثاءب من النعاس: To open the mouth wide from tiredness. Below are 6 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
To stare with the mouth open in wonder; to be wide open.
Yawning; (of a gap) very wide.
To pull or haul something along a surface, typically the ground; to move slowly and reluctantly; to search the bottom of a body of water; aerodynamic…
A short nap; to doze.
open one's mouth widebore