出典:Wiktionary
From Middle English dalke, dalk, from 古期英語 dalc (“clasp, buckle, brooch, bracelet”), from Proto-Germanic *dalkaz (“clasp, pin”), from Proto-Indo-European *dʰelg- (“to stick; needle, pin”). Cognate with Icelandic dálkur (“cloak-pin”), Latin falx (“scythe”). Doublet of falx.
From Middle English dalke; perhaps a diminutive of dale, dell. In that case from 古期英語 *daluc, from Proto-Germanic *dalukaz.