διεγγυᾶν
From LSJ
οὕτως ἐξ ἐχθρῶν αὐτοκτόνα πέμπετο δῶρα, ἐν χάριτος προφάσει μοῖραν ἔχοντα μόρου → thus mutual gifts that bring death were bestowed by enemies, gifts that brought the lot of death in the name of a favor
Greek > English (Woodhouse Verbs Reversed)
give security for a person, offer bail for (see also: διεγγυῶ, διεγγυάω)