Is credible the opposite of incredible?

Yes, "credible" and "incredible" can be considered opposites in terms of their meanings. "Credible" refers to something that is believable or trustworthy, while "incredible" describes something that is so extraordinary or unbelievable that it may be difficult to accept as true. However, it's important to note that "incredible" can also be used positively to describe something impressive, which adds nuance to the relationship between the two Words.