embase

To lower physically.

[God had] Embast the valleys, and embost the hills.

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 […]

Such pitiful embellishments of speech as serve for nothing but to embase divinity.

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.