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invoke (v.)

late 15c., from Old French invoquer, envoquer, envochier "invoke, implore" (12c.), from Latin invocare "call upon, implore," from in- "upon" (from PIE root *en "in") + vocare "to call," related to noun vox (genitive vocis) "voice" (from PIE root *wekw- "to speak"). Related: Invoked; invoking.