unflaggingadjective · Level 3 SAT1showing sustained enthusiastic action with unflagging vitalityHis unflagging commitment to justice inspired younger colleagues to persevere through difficult cases.ModuleLevel 3RegisterargumentCollectionCollection 078SAT Complete planAlso in Collection 078princely, anachronic, dogged, patronise, revelatory, secern, lissome, meagre and 1 more