shamefacedly

/ˈʃeɪmˌfeɪsɪdli/
adverb
  1. In a way that shows embarrassment or shame.
    • He shamefacedly admitted that he had forgotten his best friend's birthday.
    • The child shamefacedly returned the candy bar he had taken from the store.
    • She shamefacedly explained why she hadn't finished her homework on time.
Antonyms