hound

nouns

any of several breeds of dog used for hunting typically having large drooping ears
hound, hound dog
someone who is morally reprehensible
"you dirty dog"
blackguard, bounder, cad, dog, heel, hound

verbs

pursue or chase relentlessly
"The hunters traced the deer into the woods"; "the detectives hounded the suspect until they found him"
hound, hunt, trace