English
proact
From pro- + act.
Proto-Indo-European *pér ‘through’
Proto-Indo-European *pró ‘forwards, before’
Proto-Italic *prō ‘in front of, before’
Latin prō ‘in favor of, on behalf of’
English pro-
Proto-Indo-European *h₂eǵ-
…
Latin āctum ‘decree, law’
Latin ācta ‘register of events’
Old French acte
Middle English acte ‘an act’
English act
Today it means
verb To take action in advance of an expected event
Language periods are conventional ranges, not dates for this word.
Etymograph / proact