If "engrave" refers to carving into a surface:
* Erase: This implies removing an inscription or design that was previously engraved.
* Smooth: This refers to making a surface even and flat, removing any engraved details.
* Polish: This is a more specific version of smoothing, making the surface shiny and reflective.
If "engrave" refers to etching words or images into memory:
* Forget: This means to lose the memory of something that was previously engraved in the mind.
* Dismiss: This implies deliberately pushing a memory out of your mind, rather than simply forgetting it.
If "engrave" refers to impressing a mark on something:
* Remove: This is a general term for taking away an engraved mark.
* Obliterate: This means to completely destroy or erase the engraved mark.
The best opposite for "engrave" will depend on the specific situation and what you want to convey.