出典:Wiktionary
From Proto-West Germanic *raku, from Proto-Germanic *rakō, from Proto-Indo-European *h₃reǵ- (“to straighten, direct, make right”). Akin to Old High German rahha (“affair, cause, reason, account”).
From Proto-West Germanic *raku, from Proto-Germanic *rakō (“rake”), from Proto-Germanic *rak- (“to gather, heap up”), from Proto-Indo-European *h₃reǵ- (“to straighten, direct, make right”). Akin to Old High German rehho (“rake”) (German Rechen (“rake”)), Old Norse reka (“shovel, spade”), Gothic (rikan, “to collect, heap up”).
出典:Wikipedia