כֵּי, (= כְּאֵי, v. אֵי III) like which?; כֵּי זֶה צַד, כֵּיזֶה צד how?, in what manner? Tosef. B. Kam. III, 4. Tosef. Ter. I, 5; a. fr. ed. Zuck. (ed. usu. כֵּיצַד).