dynamic balance: (aeronautics) the state of equilibrium in which centrifugal forces due to a rotating mass (e.g., a propeller) do not produce force in the shaft and so vibration is reduced
equilibrium: a stable situation in which forces cancel one another
machiavellianism: the political doctrine of Machiavelli: any means (however unscrupulous) can be used by a ruler in order to create and maintain his autocratic government