Un-slæcBosworth & Toller 盎格鲁-撒克逊古英语词典 - un-slæc根据古英语词典：-sleac;un-slæcadj. Not slack, not lazy, strenuous, active, diligent :-- Unsleac inpiger, Wrt. Voc. ii. 47, 30: 93, 15: Kent. Gl. 140. [Icel. ú-slakr.] un-slæc