Said of a morphism: to pre-compose with each of a parallel pair of morphisms so as to yield the same composite morphism.
To clear the ears to balance the pressure in the middle ear with the outside pressure by letting air enter along the Eustachian tubes.
To adjust the balance between frequency components within an electronic signal.
To make equal; to cause to correspond in amount or degree.
To make the scoreline equal by scoring points.
To separate into groups of two.
To join two people into a relationship.