bipolaron

Etymology tree
Proto-Indo-European *dwóh₁
Proto-Indo-European *dwi-
Proto-Italic *dwi-
Latin bi-bor.
English bi-
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 *kerh₃-der.?
Latin carbōlbor.
French carbonebor.
English carbonbf.
English -on
English polaron
English bipolaron
From bi- + polaron.