Luckily we are no longer in the Middle Ages, when the letter "v" was interchanged with the letter "u." Generally, the letter "v" came at the beginning of a word and the letter "u" was used within a word. For example, "up" was written "vp" and "have" was written "haue."
It wasn't until the mid-1500s that the letter "v" started to be used as its very own consonant. Interesting, right? Nowadays, we have a veritable vault of adjectives that start with "v." Let's take a look, shall we?