Ahmed Raza Khan: Mohammed Aqib Qadri:
They shall keep going back and forth between
it and the extremely hot boiling water.
Yusuf Ali:
In its midst and in the midst of boiling hot water will they wander round!
Pickthal:
They go circling round between it and fierce, boiling water.
Courtesy of: 
(PrayerWare)
Click here to play the verse