hound
n.
Old English hund "dog," from Proto-Germanic *hundas (cognates: Old Saxon and Old Frisian hund, Old High German hunt, German Hund, Old Norse hundr, Gothic hunds), from PIE *kuntos, dental enlargement of root *kwon- "dog" (see canine). Meaning narrowed 12c. to "dog used for hunting."
v.
"hunt with hounds," 1520s, from hound, v.. Sense of "pursue relentlessly" is first recorded c.1600. Related: Hounded; hounding.