• (RP) IPA: /ˈklɪstə/
• (GA) IPA: /ˈklɪstɚ/

clyster (plural clysters)

1. (now rare) A medicine applied via the rectum; an enema or suppository.
   • 1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps, OCLC 54573970 ↗:

     , vol.I, New York 2001, p.233-4:

     Cnelius a physician being sent for, found his costiveness alone to be the cause, and thereupon gave him a clyster, by which he was speedily recovered.