verb
shall
SHUHL/ʃəl/
Marks a future action as expected or determined.
The worker shall carry out the task indicated by the team leader.

Etymology
Old English sculan expressed owing or being obliged to do something. That sense of obligation broadened to include future action, giving shall its uses for both what must happen and what will happen.
In context
The only footprints I shall leave are those that will wash away."
A game-changing moment came for me early on in my career, when I was interviewing a high-profile actress, who shall remain nameless.