browbeaten; defeated; intimidated; abject

He always went about with a hangdog look.

shamefaced; guilty

He sneaked out of the room with a hangdog expression.

suitable to a degraded or contemptible person; sneaky; furtive.

Archaic . a degraded, contemptible person.

adjective

ashamed , browbeaten , conscience-stricken , cowering , defeated , downcast , guilty , intimidated , sheepish , wretched , cowed , groveling , shamefaced , shifty , sneaking