despairingly

US /dɪˈsper.ɪŋ.li/
UK /dɪˈsper.ɪŋ.li/
1.

อย่างสิ้นหวัง

showing that you feel that there is no hope and that you can do nothing to improve a difficult or worrying situation:

:
•
He rubbed his hand despairingly over his face.