See tortuous in Webster's New World Roget's A-Z Thesaurus II
adjective
Repeatedly curving in alternate directions:
anfractuous, flexuous, meandrous, serpentine, sinuous, snaky, winding. See repetition, straightNot taking a direct or straight line or course:
anfractuous, circuitous, circular, devious, indirect, oblique, roundabout. See straight
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