συννοεῖν
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 συννοέω): ponder, reflect, brood on, contemplate mentally, cudgel one's brains, meditate on, ponder on, rack one's brains, reflect on, reflect upon, take into consideration, think of, wrack one's brains