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