The insidiousness of the disease is the result of mania and hypo-mania feeling so great and helping me be so productive.
FORBES: Bipolar Disorder Is Insidious
2.
The insidiousness of the 1939 Nazi-Soviet Trade Agreement was not limited to the essential role it played in laying the groundwork for the Non-Aggression Pact.
CENTERFORSECURITYPOLICY: Freedom Flame 2013
3.
The trampling of individual freedoms and his blatant contempt for the rights of the average American may not have been as obvious as an ax-handle-wielding governor, but Bush's insidiousness and piety have made him much more dangerous.
CNN: Commentary: My father, George Wallace, and Barack Obama