IPA: /jɔːnɪŋli/
KK: /jɔːnɪŋli/
In a manner that shows tiredness or boredom, often by yawning.
She listened yawningly to the long lecture about history.
Yawningly → It is formed from "yawn" (from Old English *geonian*, meaning to open the mouth wide) and "-ly" (a suffix meaning in a manner of). The word "yawningly" describes doing something in a manner that resembles yawning, often indicating boredom or tiredness.
Think of the action of 'opening your mouth wide' ('yawn') and how doing something 'in that manner' ('-ly') suggests a sense of boredom or tiredness.