Embarrassed and ashamed because of something that you have done.
He glanced at Juliet accusingly and she looked suitably abashed. (Oxford)
He was pleased at the gratitude he received, but felt abashed at receiving it.
The officer appeared abashed, as though he understood that one might think of how many men would be missing tomorrow but ought not to speak of it.
looked abashed
felt abashed
appeared abashed
Embarrassed
Ashamed
Unabashed
Undaunted
Abashed
Unabashed
Unabashedly