exhausting, fatigued, grueling, wearying, winded, frustrating, knackered, bored, exasperating, flustered, tuckered, gruelling, fagged, slog, harrying, sweating, annoyed, exhilarating, demoralizing, outclassed, thrilling, sapping, cantering, excruciating, knuckled, punishing, overmatched, overtrained, geed, gallop, daunting, bushed, disinteresting, rewarding, outspeed, panting, niggled, jet lag, bossing, wilted, trot, cramp, stretched, relishing, grind, enervating, dominating, coasting, breezing, entertaining, dazes, limber, sighter, plain sailing, distracting, agonizing, plodding, irritated, discombobulated, hassling, seasick, acclimatise, purple patch, outplayed, nilled, fazing, pounding, accustomed, draining, overawed, frazzling, sprinting, streakier, outboxed, invigorating, warmed, psyching, gybing, dejecting, persevering, relaxing, dreading, flappable, unsaddle, satisfying, liking, outstay, relieved, complicated, finishing, overexert, cooped, unrefreshed, scything, chasing, conceding, pedaling, malinger, pacing, backbreaking, faulter, perspiring, boring, moving, heavy, slow, changing, hard, passing, travelling, bringing, cheap, close, convincing, keen, queer, turning, winning, worry, churning, fond, near, tiresome, fatiguing, wearisome, arduous, delightful, enjoyable, tedious, unglamorous, difficult, enlivening, pleasant, pleasanter, racking, unrewarding

paradoxical

effortful, wearing