空(kōng) “emptiness” 

HD. 8.409b(11)(维摩经); DK. 8.644a(大乘义章);

19c4.如来知是一相、一味之法。所谓解脱相、离相、灭相、究竟涅槃、常寂灭相,终归于(p)

K. 124.11.ākāśa-; not found at Z. 83c12.(?);