devious (adj.)youdaoicibaDictYouDict[devious 词源字典]
1590s, "out of the way," from Latin devius "out of the way, remote, off the main road," from de via (see deviate). Originally in the Latin literal sense; figurative sense of "deceitful" is first recorded 1630s. Related: Deviously; deviousness. Figurative senses of the Latin word were "retired, sequestered, wandering in the byways, foolish, inconsistent."[devious etymology, devious origin, 英语词源]
sequester (v.)youdaoicibaDictYouDict
late 14c., "remove" something, "quarantine, isolate" (someone); "excommunicate;" also intransitive, "separate oneself from," from Old French sequestrer (14c.), from Late Latin sequestrare "to place in safekeeping," from Latin sequester "trustee, mediator," noun use of an adjective meaning "intermediate," which probably is related to sequi "to follow" (see sequel). Meaning "seize by authority, confiscate" is first attested 1510s. Alternative sequestrate (v.) is early 15c., from Latin sequestratus. Related: Sequestered; sequestering.