1325-75;Middle Englishenhauncen < Anglo-Frenchenhauncer, apparently for Old Frenchenhaucer, equivalent to en-en-1 + haucer to raise (Frenchhausser) < Vulgar Latin*altiāre (derivative of Latinaltus high, with h- < Germanic; see haughty), though -n- is unexplained
late 13c., from Anglo-Fr. enhauncer, from O.Fr. enhaucier "make greater," from V.L. *inaltiare, from L.L. inaltare "raise, exalt." The -h- in O.Fr. supposedly from influence of Frankish word for "high." Related: Enhanced; enhancing.