How to sign: make it possible through a specific action or lack of action for something to happen
"This permits the water to rush in"; "This sealed door won't allow the water come into the basement"; "This will permit the rain to run off";
Similiar / Same: allow, permit
Within this category: pass
How to sign: a serve that strikes the net before falling into the receiver's court; the ball must be served again
Similiar / Same: net ball