English

Etymology

Etymology tree
Proto-Indo-European *h₂ew
Proto-Indo-European *tó-
Proto-Hellenic *autós
Proto-Indo-European *h₂ewder.
Ancient Greek αὖ (aû)
Ancient Greek τόν (tón)
Ancient Greek αὐτός (autós)
Ancient Greek αὐτο- (auto-)lbor.
English auto-
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 ἐνεργητικός (energētikós)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 autoactivity

    From auto- + activity.

    Noun

    autoactivity (uncountable)

    1. (immunology) Synonym of autoreactivity.
    source: https://en.wiktionary.org/wiki/autoactivity