παρεναλλάσσομαι
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
English (LSJ)
Pass., A to be interchanged, Id.Phil.Hist.19.
Greek (Liddell-Scott)
παρεναλλάσσομαι: Παθ., ἐναλλάσσομαι, Γαλην. τ. 19, σελ. 245, 2.