προμάχεσθαι
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
Greek > English (Woodhouse Verbs Reversed)
(see also προμάχομαι): fight for
Lexicon Thucydideum
propugnare, to fight for, defend, 6.69.2.