plasticiser

Etymology tree
Proto-Hellenic *plátʰyō
Proto-Hellenic *pláťťō?
Ancient Greek πλάσσω (plássō)
Proto-Indo-European *-tis
Ancient Greek -τις (-tis)
Ancient Greek -σῐς (-sĭs)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
?
Proto-Indo-European *-tós
Proto-Hellenic *-tós
Ancient Greek -τος (-tos)
▲
Ancient Greek -κός (-kós)
?
Ancient Greek -τικός (-tikós)
Ancient Greek πλᾰστῐκός (plăstĭkós)der.
Latin plasticusder.
English plastic
English -ise
English plasticise
English -er
English plasticiser
From plasticise + -er.