Is it farther or further?
late 14c., from Old French sirop (13c.), and perhaps from Italian siroppo, both from Arabic sharab "beverage, wine," literally "something drunk," from verb shariba "he drank" (cf. sherbet). Spanish jarabe, jarope, Old Provençal eissarop are from Arabic; Italian sciroppo is via Medieval Latin sirupus.
syrup syr·up (sĭr'əp, sûr'-)
A concentrated solution of sugar in water, often used as a vehicle for medicine.