caníbal
From LSJ
ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
Spanish > Greek
ἀνδροβρώς, ἀνδροφάγος, ἀνθρωποβόρος, ἀνθρωποφάγος, σαρκοφάγος