dehydration, tiredness, fatigue, heat prostration, exertion, boredom, heat exhaustion, disorientation, cramps, sickness, physical exertion, altitude sickness, nervous breakdown, dizziness, faintness, weariness, heatstroke, wooziness, overwork, overexertion, sleeplessness, acrophobia, debility, agony, feverishness, jetlag, lethargy, seasickness, tearfulness, burnout, sweating, stress, vertigo, illness, hypothermia, emaciation, sunstroke, inanition, hyperventilation, lightheadedness, tedium, loneliness, homesickness, breathlessness, narcosis, jet lag, delirium, insomnia, anxiety neurosis, recumbency, staleness, laziness, aches, debilitative, stage fright, crabbiness, restlessness, exhilaration, fidgetiness, paralyzation, indigestion, lassitude, debilitation, listlessness, tracheitis, sleepiness, giddiness, hyperacidity, suffering, neurosis, ennui, clamminess, forgetfulness, dullness, diaphoresis, pain, hypernatremia, senility, unwellness, melancholia, paresis, immobility, apnoea, heaviness, incapacity, stomach ache, hangovers, polydipsia, hypovolemia, aloneness, infirmity, stagefright, discomfort, overexcitement, indisposition, vomiting, dehydrating, sore throat, grogginess, lumbago, dumbness, sweatiness, prostration, disorganization, demoralization, disintegration, disorganisation, starvation, alienation, enfeeblement, estrangement, suffocation, impoverishment, collapse, privation, annihilation, insecurity, undoing, derangement, disillusionment

brain-fag, frazzle, mental exhaustion

., arduous, backbreaking, blear, blear-eyed, bleary, bleary-eyed, brain-fag, dazed, downed, drooping, droopy, exhausting, felled, flagging, foaming, foamy, foggy, frazzle, frothing, grogginess, groggy, grueling, gruelling, hard, heavy, inanition, john henry, laborious, last gasp, logy, mental exhaustion, plotz, punishing, sagging, second wind, shipping fever, shipping pneumonia, slaphappy, stuporous, tiring, toilsome, wearing, wearying

depletion, weakening

enervation