English Etymology Etymology treeProto-Indo-European *h₁ep-der.Proto-Indo-European *h₁épsder.Proto-Indo-European *h₁épiProto-Indo-European *-tm̥mos?Latin optimusEnglish -alEnglish optimalProto-Indo-European *-teh₂Proto-Indo-European *-tsProto-Indo-European *-teh₂tsder.Latin -itāsOld French -itebor.Middle English -iteEnglish -ityEnglish optimalityFrom optimal + -ity. Noun optimality (countable and uncountable, plural optimalities) The property of being optimal. Derived terms nonoptimalityoptimality theoreticaloptimality theoryPareto optimalitySchur-optimalitysub-optimality Translations property of being optimal Czech: optimálnost f, optimalita f Finnish: optimaalisuus French: optimalité (fr) f German: Optimalität (de) f Swedish: optimalitet (sv) c