Useful english dictionary. 2012.
slay — v. a. [sle]. 1128 B.; pret. ‘slowe.’ RG. 528; ‘slou.’ RG. 376; ‘slouȝ.’ 2373 B.; 2. pl. imper. ‘sleth.’ RG. 236; part. ‘yslawe.’ RG. 9 … Oldest English Words