τὸ ἀεὶ ταῦτα οὕτως ἔχειν ἐχάλασαν → relaxed the strictness of the doctrine of perpetual strife
Celt, Kelt = Κέλτης
Celts, Kelts, Celtae = Κελτοί, οἱ, Κελταί, οἱ.
Celtic, Keltic, adj.: Κελτικός.