disimprove
verbEtymology From dis- + improve.
1
Rare To make worse.
- To which may be added this advantage, that the services of churchmen are rewardable upon the church's stock: no need to disimprove the royal banks to pay thanks to bishops.1642, Jeremy Taylor, The Sacred Order and Offices of Episcopacy or Episcopacy Asserted against the Arians and Acephali New and Old:
2
Rare To deteriorate.