The antonyms for the word "half-priced" are numerous, as they encompass a wide variety of options. Some of the most commonly used antonyms for "half-priced" would include "full-priced," "expensive," and "overpriced." On the other hand, some people may consider "discounted," "marked down," or "bargain-priced" as antonyms for "half-priced." Ultimately, the choice of antonym will depend on the context surrounding the use of the word. For instance, if you were discussing the cost of luxury goods, then "expensive" would likely be the most relevant antonym. Meanwhile, if you were discussing the pricing of everyday items, then "discounted" or "bargain-priced" may be more appropriate.