The term "wast common" refers to something that is very rare, unusual or infrequent. The antonyms for this term would be "frequent," "common," "usual," or "regular." These words signify something that is occurring often, typically or regularly. When we describe something as "common," it suggests that it is ordinary, familiar, or widespread. Using antonyms such as "frequent" or "regular" emphasizes the regularity or consistency of something. In contrast, "wast common" is a phrase that entails scarcity, uniqueness or rarity. Therefore, using these antonyms help us better describe things that occur regularly, which is the opposite of "wast common.