 Gam-sao. Gam-sao means to press down So it's literally pressing down like this and in the wooden dummy we have the gam-sao like this near the end and This is to stop lower attack. So if somebody is doing a kick you can do a gam-sao Or somebody does a low attack you can do gam-sao to press down or you can just simply use this to press something down Jikun just means straight punch and in the wooden dummy form we see that here when we do a Jaj-sao and a jikun