courierA person whose job is to carry messages, packages, or important documents from one place to another.
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One that carries and delivers"Michael was a courier for the Tsar, delivering important messages."
treasonThe crime of doing something that could cause danger to your country, such as helping its enemies during a war.
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The crime of betraying one's country, especially by attempting to kill or overthrow the sovereign or government."He was accused of treason against the Tsar."
surveillanceClose observation, especially of a suspected spy or criminal.
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Close observation or supervision maintained over a person, group, etc, especially one in custody or under suspicion"He was under surveillance due to suspicions of his actions."
vodkaA type of strong, clear alcoholic drink, originally from Russia.
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An alcoholic spirit of Russian origin made by distillation of rye, wheat, or potatoes."They shared a bottle of vodka."
SiberiaAn extensive geographical region spanning much of Eurasia and North Asia. It has been a part of modern Russia since the late 17th century.
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A vast Russian province encompassing most of Northern Asia."He was sent on a mission to Siberia."
decipherConvert (a text written in code, or a coded signal) into normal language.
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To convert (a message or other text) from cipher into plain text."He tried to decipher the coded message."