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καθ’

Ἢ τὰν ἢ ἐπὶ τᾶς -> Either with this or on this | Come back victorious or dead
Plutarch, Moralia 241

Greek (Liddell-Scott)

καθ’: ἱδίαν (= κατ’ ἰδίαν), Ἐπιγρ. Ἀθηνῶν τοῦ Β΄ π.Χ. αἰῶνος, CIA. II. 436 κ. ἀλλ.

French (Bailly abrégé)

p. κατά, dev. un esprit rude.