Diminish

1. To take away; to subtract.
2. To become or appear less or smaller; to lessen; as, the apparent size of an object diminishes as we recede from it.
3. To make smaller in any manner; to reduce in bulk or amount; to lessen; -- opposed to augment or increase.
4. To make smaller by a half step; to make (an interval) less than minor; as, a diminished seventh.
5. To lessen the authority or dignity of; to put down; to degrade; to abase; to weaken.