difícil de combatir
From LSJ
Μεγάλοι δὲ λόγοι μεγάλας πληγὰς τῶν ὑπεραύχων ἀποτίσαντες γήρᾳ τὸ φρονεῖν ἐδίδαξαν → The great words of the arrogant pay the penalty by suffering great blows, and teach one to reason in old age
Spanish > Greek
δυσπόλεμος, δύσμαχος, δυσαγώνιστος, δυσπολέμητος, δυσπάλαιστος, δυσπάλαμος, δυσανταγώνιστος