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misery (n.): late 14c., "condition of external unhappiness," from Old French misere "miserable situation, misfortune, distress" (12c.), from Latin miseria "wretchedness," from miser (see miser). Meaning "condition of one in great sorrow or mental distress" is from 1530s. Meaning "bodily pain" is 1825, American English.
sore (n.): Old English sar "bodily pain or injury, wound; sickness, disease; state of pain or suffering," from root of sore (adj.). Now restricted to ulcers, boils, blisters. Compare Old Saxon ser "pain, wound," Middle Dutch seer, Dutch zeer, Old High German ser, Old Norse sar, Gothic sair.
torture (n.): early 15c., "contortion, twisting, distortion; a disorder characterized by contortion," from Old French torture "infliction of great pain; great pain, agony" (12c.), and directly from Late Latin tortura "a twisting, writhing," in Medieval Latin "pain inflicted by judicial or ecclesiastical authority as a means of punishment or persuasion," from stem of Latin torquere "to twist, turn, wind, wring, distort" (see torque (n.)). The meaning "infliction of severe bodily pain as a means of punishment or persuasion" in English is from 1550s. The theory behind judicial torture was that a guilty person could be made to confess, but an innocent one could not, by this means. Macaulay writes that it was last inflicted in England in May 1640.