DEATHSTILL — Definition from Imperial Archives, Commentary from Count Fenring

Definition: a receptacle that can receive a corpse and then drains and filters the fluids for water. The waste is sluiced off into a separate compartment.
Commentary: discovering these was an unexpected boon of the Sardaukar pogrom. Deep within the abandoned sietches we found ceremonial deathstills and great, empty chambers where it seems water once flowed. The practicaility of the Fremen astounds me still – and CHOAM have already begun building imitation deathstills for the slavers and miners who might find themselves with an excess of bodies, and a lack of water.