favorable (adj.)youdaoicibaDictYouDict[favorable 词源字典]
late 14c., "kind, friendly," from Old French favorable "well-disposed, favorable, partial," from Latin favorabilis "favored, in favor," from favor "good will, partiality" (see favor (n.)). Meaning "advantageous" is from mid-15c. In Middle English it also meant "attractive, pleasing, agreeable." Related: Favorably.[favorable etymology, favorable origin, 英语词源]