The term 'followed relentlessly' can be summarized by two crossword solutions: 'DOGGED' and 'STALKED'. 'DOGGED' is an adjective meaning to persistently pursue or persist in an endeavor despite difficulties, obstacles, or discouragement. 'STALKED' is a verb meaning to follow or observe someone stealthily and persistently, especially out of obsession or a feeling of entitlement. Both words imply that the subject is being followed in an intrusive and relentless manner.