[ zek ]
/ zɛk /
(in the former U.S.S.R.) an inmate of a forced-labor camp.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"Russian condemned person in a prison or labor camp," 1968, from Russian zek, probably representing a vocalization of z/k, abbreviation of zaklyuchennyi "prisoner."
Online Etymology Dictionary, © 2010 Douglas Harper