polariscope

Etymology tree
Proto-Indo-European *kʷel-der.
Proto-Indo-European *kʷól-os
Proto-Hellenic *pólos
Ancient Greek πόλος (pólos)der.
Latin polus
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālis
Latin -āris
Late Latin polārislbor.
English polar
Proto-Indo-European *speḱ-
Proto-Indo-European *-yeti
Proto-Indo-European *spéḱyeti
Proto-Hellenic *sképťomai
Ancient Greek σκέπτομαι (sképtomai)
Proto-Indo-European *-ós
Proto-Hellenic *-ós
▲
Ancient Greek -ος (-os)influ.
Ancient Greek -ός (-ós)
Ancient Greek σκοπός (skopós)
Proto-Indo-European *-eti
Proto-Indo-European *-eyéti
Proto-Indo-European *-esyéti
Proto-Indo-European *-éh₁ti
Proto-Indo-European *-yeti
Proto-Indo-European *-éh₁yeti
Proto-Indo-European *-yeti
Proto-Indo-European *-éyeti
Ancient Greek -έω (-éō)
Ancient Greek σκοπέω (skopéō)der.
English -scope
English polariscope
From polar + -scope.