No, the word ‘yawn’ is not considered an onomatopoeia. An onomatopoeia is a word that phonetically imitates, resembles, or suggests the sound that it describes. Examples include words like ‘buzz’, ‘bang’, or ‘sizzle’. While ‘yawn’ describes the act of yawning, it does not mimic the sound produced during the action.
Yawning typically produces a sound, but the word itself does not capture that sound like true onomatopoeic words do. Therefore, while ‘yawn’ describes an action and the associated sound, it does not fulfill the criteria to be classified as an onomatopoeia.