embase

verb3

1. •
   (no longer used) To lower physically.

   • [God had] Embast the valleys, and embost the hills. — 1608
2. •
   (no longer used) To bring down or lower in position, status, etc.; to degrade, humiliate.

   • And either vowd with all their power and witt To let not others honour be defaste Of friend or foe, who ever it embaste […] — 1590
3. •
   (no longer used) To lower the value of (a coin, commodity etc.); to debase (a coin) with alloy.

   • Alloy in coin of gold […] may make the metal work the better, but it embaseth it. — 1625