Responsible for or chargeable with a reprehensible act.

Roget 947: guilty, to blame, culpable, peccable^†, in fault, at fault, censurable, reprehensible, blameworthy, uncommendable, illaudable^†; weighed in the balance and found wanting; exceptionable.   

Roget 971: condemnatory, damnatory^†; guilty, condemned etc. v.; nonsuited etc. (failure) 732^†; self-convicted.   

Polish: odpowiedzialny, winny

Showing a sense of guilt:
— A guilty look.

synonyms: hangdog, shamed, shamefaced.