ἀναρρηγνύναι

From LSJ

ἀλλ' οὐδὲν δεῖ παρὰ τὸν βωμόν σε βουλεύειν → better safe than sorry

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἀναρρήγνυμι): tear open, break open

Lexicon Thucydideum

perfringere, to break through, 7.36.3, 7.40.5,
PASS. 7.34.5.