reduce

To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower.

“to reduce weight, speed, heat, expenses, price, personnel etc.”

To lose weight.

To bring to an inferior rank; to degrade, to demote.

“Hester Prynne was shocked at the condition to which she found the clergyman reduced.”

To humble; to conquer; to subdue; to capture.

“to reduce a province or a fort”

To bring to an inferior state or condition.

“to reduce a city to ashes”

To decrease the liquid content of food by boiling much of its water off.

To add electrons / hydrogen or to remove oxygen.

To produce metal from ore by removing nonmetallic elements in a smelter.

To simplify an equation or formula without changing its value.

To express the solution of a problem in terms of another (known) algorithm.

To convert a syllogism to a clearer or simpler form

To convert to written form. (Usage note: this verb almost always appears as "reduce to writing".)

“It is important that all business contracts be reduced to writing.”

To perform a reduction; to restore a fracture or dislocation to the correct alignment.

To reform a line or column from (a square).

To strike off the payroll.

To annul by legal means.

To translate (a book, document, etc.).

“a book reduced into English”