English
forearc
From fore- + arc.
Proto-Indo-European *per- ‘before, formerly’
Proto-Germanic *fura- ‘before, in front of, for’
Proto-West Germanic *forē- ‘before, in front of, fore-, pre-’
English fore-
Proto-Indo-European *h₂erkʷ-
…
Proto-Italic *arkuos
Latin arcus ‘a bow, arc, arch’
Old French arc ‘arch’
Middle English ark ‘the path of the sun across the sky’
English arc
Today it means
noun A region of raised rock debris which forms between the subduction zone and any associated volcano or volcanic chain.
Language periods are conventional ranges, not dates for this word.
Etymograph / forearc