Concept:The antonym of a word means the word with the opposite meaning. "Inflate" means to make something larger or fill with air, so its opposite is to make smaller or reduce.
Explanation:Understand the meaning of "inflate": to blow up, expand, or increase in size, literally or figuratively. For example, a balloon inflates when air is pumped in.
The opposite action is to make something smaller, decrease, or lessen.
Option A "Increase" is similar, not opposite. Option C "Expand" is also similar. Option D "Swell" means to enlarge, often from pressure. Only Option B "Reduce" means to make smaller in size, amount, or degree.
Thus, the correct antonym is "Reduce".
Answer:Reduce