fastslå angolul

ascertain [ascertained, ascertaining, ascertains]▼(find out; discover or establish)
verb
[UK: ˌæ.sə.ˈteɪn] [US: ˌæ.sər.ˈteɪn]

establish [established, establishing, establishes]▼(To make stable or firm; to confirm)
verb
[UK: ɪ.ˈstæ.blɪʃ] [US: ə.ˈstæ.blɪʃ]