greppa betyder på engelska

apprehend [apprehended, apprehending, apprehends]▼(to take hold of (something) with the understanding, see also: understand)
verb
[UK: ˌæ.prɪ.ˈhend] [US: ˌæ.prə.ˈhend]

grasp [grasped, grasping, grasps]▼(to grip)
verb
[UK: ɡrɑːsp] [US: ˈɡræsp]

twig▼(to realise something)
verb
[UK: twɪɡ] [US: ˈtwɪɡ]