relentlessadjective · Level 3 SAT1not to be placated or appeased or moved by entreatyThe relentless pace of the investigation left the detectives exhausted but unwilling to pause.ModuleLevel 3RegisteracademicCollectionCollection 078SAT Complete planAlso in Collection 078princely, anachronic, dogged, patronise, revelatory, secern, unflagging, lissome and 1 more