1. continue firmly or obstinately in an opinion or a course of action in spite of difficulty, opposition, or failure: "the minority of drivers who persist in drinking"Similarperseverecontinuecarry ongo onkeep at itkeep onkeep goingkeep it upnot give upbe persistentbe determinedsee/follow something throughshow determinationpress on/aheadplod onplow onstay with somethingnot take no for an answerbe tenaciousbe pertinaciousinsistbe patientbe diligentstand one's groundstand fast/firmhold onhold outgo the distancestay the coursegrind awaystruggle onhammer awaystop at nothingleave no stone unturnedinformal:plug awaypeg awaystick at itsoldier onhang onstick to one's gunsstick it outhang in therebash onOppositeabandonstop