English
marshfire
marsh + fire
Proto-Indo-European *móri ‘standing water’
…
Proto-West Germanic *mari ‘sea, lake’
Proto-West Germanic *marisk ‘lake-like, marshy’
Old English mersċ ‘a marsh, bog, or swamp’
Middle English mersch ‘a region of marshland or damp meadowland’
English marsh
Proto-Indo-European *péh₂wr̥
…
Proto-Germanic *fuïr
Proto-West Germanic *fuir
Old English fȳr ‘fire’
Middle English fyr
English fire
Today it means
noun A fire occurring in marshland.
Language periods are conventional ranges, not dates for this word.
Etymograph / marshfire