Preventually 

Similar to eventually.
When something happened sometime in the past, but you don't know when.

I know preventually she did it.

Preventually by G November 21, 2003

Preventually 

Something that you are trying to prevent but know will eventually occur.

Her hydroflask has so many dents from falling on the ground that preventually it won’t stand up without falling over!

Preventually by jacksmama8 May 28, 2022