ἀνταλλάσσειν
permutare to exchange, 3.82.3, 4.14.3,
quum, permutato more, Lacedaemonii e terra quasi navalem pugnam, Athenienses e navibus pedestrem, facerent when, their usual roles reversed, the Spartans fought a naval battle from land, and the Athenians an infantry battle from their ships. [