出典:Wiktionary
出典:『Wiktionary』 (2025/12/01 22:42 UTC 版)
Of unclear origin, though probably related to fimus (“dung”) or foedus (“filthy”), and ultimately derived from Proto-Indo-European *dʰewh₂- (“smoke”). See also furvus (“dark, swarthy”), fūmus (“smoke”), fūlīgō (“soot”). (Can this etymology be sourced?)