1) Abashed 2) Abject 3) Afraid 4) Ashamed 5) Browbeaten 6) Bullied 7) Cowed 8) Sad 9) Shamed 10) Trail 1) Abject 2) Abject; ashamed 3) Ashamed 4) Dejected 5) Guilty 6) Intimidated 7) Shamed 8) Shamefaced 9) Sheepish 10) Showing a sense of guilt 11) Very sad-looking 
• (n.) A base, degraded person; a sneak; a gallows bird. • (a.) Low; sneaking; ashamed.
Hang'dog` (-dŏg`) noun A base, degraded person; a sneak; a gallows bird. Hang'dog` adjective Low; sneaking; ashamed. « The poor colonel went out of the room with a hangdog look.» Thackeray. 
A hangdog or hang-dog is a low, despicable, degraded person or a sneaking shamefaced person, fit only to hang a dog or to be hanged like a dog - hence the term. The term hang-dog was a fairly popular term of insult from the 17th to the 19th century.