thermoactuator

Etymology tree
Proto-Indo-European *gʷʰer-der.
Ancient Greek θερμός (thermós)der.
English thermo-
Proto-Indo-European *h₂eǵ-
Proto-Indo-European *-eti
Proto-Indo-European *h₂éǵeti
Proto-Italic *agō
Latin agō
Proto-Indo-European *-tus
Proto-Italic *-tus
Latin -tus
Latin āctus
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Latin -ō
Latin āctuō
Medieval Latin āctuātusder.
English actuate
Proto-Indo-European *-tōr
Proto-Italic *-tōr
Latin -tor
Latin -ātor
Old French -eorbor.
Middle English -our
▲
Latin -torlbor.
English -or
English actuator
English thermoactuator
From thermo- + actuator.