Contort is from Latin contortus, past participle of contorquere ('to twist together, whirl'), from con- ('together') + torquere ('to twist'). The ancestry passes through Latin contorquere, Latin torquere, and Proto-Indo-European *terkw-. The prefix con- adds togetherness, combination, or intensification where the Latin formation gives it that value, helping to explain the word's surface structure. In present use as a verb, it means "to twist or bend out of normal shape, often violently", keeping the historical formation close to the word's ordinary semantic work. Related words include torture, torsion, tortuous, and retort; derived forms include contortion, contorted, and contortionist.