IPA: /ˈʃeɪmfəli/
KK: /ˈʃeɪmfəli/
In a way that shows a feeling of guilt or embarrassment about something wrong or bad that has been done.
He shamefully admitted his mistake in front of the class.
Shamefully → It is formed from "shame" (from Old English "sceamu", meaning a painful feeling of humiliation or distress caused by the consciousness of wrong or foolish behavior) and "-fully" (meaning in a manner full of). The word "shamefully" means in a manner full of shame or disgrace.
Think of feeling 'full of shame' — that's what 'shamefully' means.