enter

To come or go into.

“the boat entered an area of shallow marshes”

Be or play a part of or in.

Register formally as a participant or member.

Set out on (an enterprise or subject of study).

Take on duties or office.

Put or introduce into something.

Become a participant; be involved in.

“enter a race”

“enter an agreement”

Make a record of; set down in permanent form.

Come on stage.