Synonyms of 'hangdog'
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If you feel guilty, you feel unhappy because you think that you have done something wrong or have failed to do something which you should have done.
When she saw me, she looked extremely guilty.
Someone who feels wretched feels very unhappy.
The wretched look on the little girl's face melted his heart.
Thesaurus for hangdog from the Collins English Thesaurus
If you say that someone has a hangdog expression on their face, you mean that they look sad , and often guilty or ashamed .