An Etymological Dictionary of the German Language/Hasel

by Friedrich Kluge

Hasel, f., ‘hazel,’ from the equiv. MidHG. hasel, OHG. hasala, f., hasal, m.; comp. AS. hœsel, E. hazel, OIc. hasl (hence hǫslur, plur., ‘boundary posts’); the common Teut. word for ‘hazel,’ from pre-Teut. kósolo-; hence in Lat., with the normal change of s into r, corulus, ‘hazel’; comp. further OIr. coll, ‘hazel,’ for *cosl.