IPA: /ˈrɛtʃ.ɪd.li/
KK: /ˈrɛtʃɪdli/
In a very unhappy or unfortunate way.
She wretchedly accepted her defeat in the competition.
Wretchedly → It is formed from "wretched" (from Old English *wreċċed*, meaning afflicted or miserable) and "-ly" (meaning in a manner of). The word "wretchedly" means in a manner that is miserable or afflicted.
Think of someone who is feeling very miserable or afflicted ('wretched') and how they might act or feel in that state — that's why 'wretchedly' means to do something in a miserable way.