Sheepish

He had a sheepish grin on his face when she told him that she had found out his secret.

Tom looked a bit sheepish.

It had been Bucklaw's misfortune, that his habits of life had not rendered him familiarly acquainted with the higher and better classes of female society, so that, with all his natural audacity, he felt sheepish and bashful when it became necessary to address a lady of distinction.

Ziri was talking with a sheepish air of apology.

“King Ty? Your sister is back.” “I don't want to talk to her unless she's here to apologize. Does she look sheepish?” “I guess I've seen a sheep in a cage before, so, yeah, kind of.”

a sheepish girl

a sheepish grin