shamefaced

(s) extremely modest or shy
- "cheerfully bearing reproaches but shamefaced at praise"- H.O.Taylor
(s) showing a sense of shame sheepish,
(s) showing a sense of guilt
- a guilty look
- "the hangdog and shamefaced air of the retreating enemy"- Eric Linklater
hangdog, shamed, guilty,

sheepish hangdog shamed guilty

shamefacedly shamefacedness