English
fire-fang
From fire + fang; see fang (“to seize”).
Proto-Indo-European *péh₂wr̥
…
Proto-Germanic *fuïr
Proto-West Germanic *fuir
Old English fȳr ‘fire’
Middle English fyr
English fire
Proto-Germanic *fanhaną ‘to take, to seize’
Proto-West Germanic *fą̄han ‘to take, to seize’
Old English fōn ‘to catch, take, seize’
Old English fengtōþ ‘molar tooth’
Middle English *fangtooth
English fang
Today it means
verb To cause (manure) to lose its goodness and acquire an ashy hue because of the heat generated by decomposition.
Language periods are conventional ranges, not dates for this word.
Etymograph / fire-fang