ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
oscillo, concussio, decutio, succussio, conquasso, fluidus, vacillo, fluctuatio, conquassatio, commoveo, sollicito, concutio, titubo, quatio