ἐναντίβιος
From LSJ
ὅπλον μέγιστόν ἐστιν ἡ ἀρετή βροτοῖς → man's greatest weapon is virtue, virtue is the greatest weapon for mortals
English (LSJ)
ον,
A set against, hostile, αἰθυίαις οὔποτ' ἐναντίβιος AP10.8 (Arch., Herm. for οὔποτε ἀντιβίας): elsewh. neut. as Adv., face to face, against, μαχέσασθαι, πολεμίζειν, 11.8.168, 10.451, etc.; ἐλθεῖν 20.130; στῆναι 21.266: c.gen., Ἀχιλῆος ἐ. πολεμίξειν 20.85.--Only poet.