dogging

(verb) go after with the intent to catch. Synonyms: chase, chase after, trail, tail, tag, give chase, dog, go after, track. Examples: "The policeman chased the mugger down the alley." "The dog chased the rabbit."

(adj) relentless and indefatigable in pursuit or as if in pursuit. Synonyms: persisting. Example: "Impossible to escape the dogging fears."