ἀπ᾽ ἐκείνης οὖν τῆς ἡμέρας συνεβουλεύσαντο ἵνα ἀποκτείνωσιν αὐτόν.

1. ἀπ᾽
   from
2. ἐκείνης
   that
3. οὖν
   therefore
4. τῆς
   of the
   the
5. ἡμέρας
   days
   day
6. συνεβουλεύσαντο
   they took counsel together
   they counseled, they took counsel
7. ἵνα
   so that
8. ἀποκτείνωσιν
   they might kill
9. αὐτόν
   him
10.  
    .
     

Therefore, from that day they took counsel together so that they might kill him.