solo- (Proto-Indo-European) comes from Esperanto -o, from Spanish -ó, from Latin Aramaicus, from Ancient Greek Ἀραμαϊκός, from Aramaic ܐܪܡܝܐ, from Aramaic ארמיא, from Aramaic ארם — Aram (son of Shem).
solo- (Proto-Indo-European): whole