prepares
v.v. to get something ready so that it can be used, or to get yourself ready for a future event.
v. to make someone or something ready for a specific purpose, event, or use.
She prepares a healthy breakfast every morning before work.
The chef prepares the ingredients hours before the restaurant opens to ensure the service runs smoothly.
As the storm approaches the coastline, the local government prepares the community by opening emergency shelters and distributing sandbags to residents in flood-prone areas.
The verb is transitive when referring to things ('prepares a meal') but can be used with 'for' when referring to events ('prepares for an exam').
she prepares for the dinnershe prepares the dinnerWhen the action is the direct creation of something (like a meal), do not use 'for'; use 'for' only when getting ready for an upcoming event.