1 This can happen when the arteries to the heart become thicker and harder from a buildup of plaque. 2  High blood pressure causes scarred arteries that fill up with plaque and become more prone to blood clots.
To commandeer is to take possession or control of something, or to take control of something for a military or law-enforcement purpose, or to make someone help you.
Full Definition of TYRANT. 1. a: an absolute ruler unrestrained by law or constitution b: a usurper of sovereignty. 2. a: a ruler who exercises absolute power oppressively or brutally b: one resembling an oppressive ruler in the harsh use of authority or power. See tyrant defined for English-language learners.