circumvolution (n.)youdaoicibaDictYouDict
mid-15c., noun of action from past participle stem of Latin circumvolvere "to revolve through, to roll around" (see circumvolve).
pole (n.2)youdaoicibaDictYouDict
"ends of Earth's axis," late 14c., from Old French pole or directly from Latin polus "end of an axis;" also "the sky, the heavens" (a sense sometimes used in English from 16c.), from Greek polos "pivot, axis of a sphere, the sky," from PIE *kwol- "turn round," from root *kwel- (1) "wheel; turn, roll around" (see cycle (n.)).