to get yourself ready for something
se préparer à quelque chose (se preparer a quelque chose)
"I like to prep for big presentations the night before."
"J'aime prep for de grandes présentations la nuit précédente." (J'aime **prep for** de grandes présentations la nuit précédente.)
to keep smiling even during difficult times
to search or investigate something to find more information
to impose strict security controls on something
to use your experience or strength to deal with something
to assume control or responsibility for something
to reverse or withdraw from an earlier statement or promise