Diminish

To make smaller in any manner; to reduce in bulk or amount; to lessen; -- opposed to augment or increase.

To lessen the authority or dignity of; to put down; to degrade; to abase; to weaken.

To make smaller by a half step; to make (an interval) less than minor; as, a diminished seventh.

To take away; to subtract.

To become or appear less or smaller; to lessen; as, the apparent size of an object diminishes as we recede from it.

decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"