inject, drive, hunker down, brace, tackle, gird, brave, rally, fight, plow through, plow on, infuse, face, focus, convince, persuade, risk, dare, demand, resolve, undertake, stand up for, rustle up, determine, prove, buckle down, forge ahead, shed (doubts), set one's mind to, plunge into, hold firm, hold out for, assert, muster, generate (momentum), strive, remind oneself/others, stand (one's ground), dedicate oneself, strengthen (the team), summon (strength), drive oneself, grit one's teeth

bear, plow on, hold up, thwart, plug away, carry on, endure, persevere, tolerate, parry, swallow one's pride, withstand, sacrifice, resist, push through, forge ahead, push forward, press on, soldier on, grit (one's teeth), stick (to something), weather, sustain one's efforts, dedicate, confront (obstacles), intensify (one's work), redouble (one's efforts), outlast (naysayers), devote one's efforts to, carry through, come through, slog through (tasks), manage (challenges), ward off (doubts/opponents), push on