ῥήγνῦμι
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
English (Autenrieth)
(ϝρ., cf. frango), 3 pl. ῥηγνῦσι, ipf. iter. ῥήγνυσκε, fut. ῥήξω, aor. ἔρρηξα, ῥῆξε, mid. pres. imp. ῥήγνυσθε, aor. (ἐρ)ρήξαντο: break, burst, rend in twain, different from ἄγνῦμι. Freq. of breaking the ranks of the enemy in battle, φάλαγγας, ὅμῖλον, στίχας, Il. 6.6, Λ , Il. 15.615.—Mid., break for oneself, Il. 11.90, Il. 12.90; break intrans., as waves, and fig., ‘let break out,’ ‘let loose,’ ἔριδα, Il. 20.55.