underactivity

Etymology tree
Proto-Indo-European *h₁én
Proto-Indo-European *h₁entér
Proto-Indo-European *(H)n̥dʰí
Proto-Indo-European *-ér
Proto-Indo-European *(H)n̥dʰér
Proto-Germanic *under
Proto-West Germanic *undar
Old English under-
Middle English under-
English under-
Proto-Indo-European *h₂eǵ-
Proto-Indo-European *-eti
Proto-Indo-European *h₂éǵeti
Proto-Italic *agō
Latin agō
Proto-Indo-European *-wós
Proto-Indo-European *-iHwósder.
Latin -īvus
▲
Ancient Greek ἐνεργητῐκός (energētĭkós)sl.
Latin āctīvus
Proto-Indo-European *-teh₂
Proto-Indo-European *-ts
Proto-Indo-European *-teh₂ts
Proto-Italic *-tāts
Latin -tās
Latin āctīvitāsder.
Middle French activitébor.
English activity
English underactivity
From under- + activity.