[ひやく, hiyaku] (n, vs) (1) leaping; activity; (2) leapfrog (over a problem); making a leap (e.g. in logic); (3) making great strides; making rapid progress; (4) emerging; (5) becoming active; playing an active part; (P)#12834
[だいやくしん, daiyakushin] (n) (1) Great Leap Forward (failed attempt to industrialize China and increase agricultural production, from 1958-1960); (n, vs) (2) significant breakthrough; great strides