ὑπερφᾰλαγγ-έω · hyperphalang-eō — LSJ
extend the line of oneʼs phalanx so as to outflank the enemy on both wings, Ascl. Tact. 10.18, Arr. Tact. 29.10, Ael. Tact. 38.1: generally, outflank, X. Cyr. 7.1.5, etc.: c. gen., ὑ. τοῦ στρατεύματος ib. 6.3.20; ὑ. ὑπὲρ τὸ κέρας Arr. Tact. 25.9.