Learn how to say Cheka correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Cheka:
an organization under the Soviet regime for the investigation of counter-revolutionary activities. It executed many real and alleged enemies of Lenin’s regime from its formation in 1917 until 1922, when it was replaced by the OGPU.
Russian, from che, ka, the initial letters of Chrezvychaĭnaya komissiya ‘Extraordinary Commission (for combating Counter-revolution, Sabotage, and Speculation)’