impenetrable jungle

непрохідні джунглі (що стоять глухою стіною) (Pursuit was impossible owing to the impenetrable jungle. - ‘My Early Life’ by Winston Churchill)

jungle operations

jungle survival

jungle canopy platform (system)

jungle clothing

jungle combat school

jungle laboratory

jungle message coder-decoder

jungle training

jungle training area

jungle warfare training center

jungle-oriented

fringe of jungle