Bell

To be superior in something.

To open out into a bell shape.

To undertake a dangerous action in the service of a group.

To make a phone call.

To be defeated in a contest.

To seem at least vaguely familiar.

To strike or bump one's own head with a strong blow, especially with concussive force.

In a boxing or wrestling match or similar competition, to ring the bell which concludes the round and thereby to prevent a competitor who has been knocked down from being counted out by the referee.

Of a competitor in a boxing or wrestling match or similar competition, spared from being counted out by the referee by the ringing of the bell which concludes the round.

To reverse the irreversible; to perform the impossible.