unicompartmental

Etymology tree Proto-Indo-European *ís? Proto-Indo-European *h₁óynos Proto-Italic *oinos Old Latin oinos Latin ūnus Latin ūni-der. English uni- Proto-Indo-European *ḱe Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin com- Proto-Indo-European *perh₃-der.? Proto-Italic *partis Latin pars Latin partiō Latin partior Latin compartīrībor. Italian compartire Proto-Indo-European *-mn̥ Proto-Indo-European *-mn̥tom Proto-Italic *-məntom Latin -mentum Italian -mento Italian compartimentobor. Middle French compartimentder. English compartment Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English unicompartmental By surface analysis, uni- + compartment + -al.

来源：wiktionary