English
forestream
From fore- + stream.
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 *srew- ‘to flow’
…
Proto-Germanic *straumaz
Proto-West Germanic *straum
Old English strēam
Middle English streem
English stream
Today it means
noun The initial, early, or forward-positioned part of a stream (all senses); a stream occurring at the ahead or front (of a thing)
Language periods are conventional ranges, not dates for this word.
Etymograph / forestream