They inclosed (συνεκλεισαν). Effective aorist active indicative with perfective compound συν.

They shut together. Were breaking (διερησσετο). Imperfect passive singular (δικτυα being neuter plural). This is the late form of the old verb διαρηγνυμ. The nets were actually tearing in two (δια-) and so they would lose all the fish.