jakkum

jakkum [ME jakke < OF jaque < Arab. šakk] , sleeveless defensive tunic, quilted or lined with iron plates. 1401 item lego ‥ omnem armaturam meam et unum jakk’ de Feris’ MS Lincs RO Episcopal Reg. XIII f. 36v; 1451 vi et armis, viz. gladiis, ~is, salettis, arcubus et sagittis, clausum et domum ‥ felonice fregerunt Pat 473 m. 5.