Reduce is a verb that means to make something smaller or lessen its amount, quantity or intensity. Antonyms are words that are opposite in meaning to another word. Some antonyms for reduce include increase, expand, enlarge, magnify, and escalate. Increase suggests making things bigger or growing, while expand refers to spreading out, becoming more extensive or comprehensive. Enlarge means to make something larger or increase its size, while magnify implies making something larger or more prominent, often through a lens or microscope. Finally, escalate suggests making something greater or more intense, often in a negative sense such as a conflict or situation.