Answer:
prevalence → verb → to prevail
potentially → noun → potential
vulnerable → noun → vulnerability
accessible → verb → to access
censorship → adverb → censorious
volunteer → adjective → voluntary
dubious → noun → dubiousness
system → adjective → systematic
regular → verb → to regulate
suitability → verb → to suit
Explanation:
In the English language, especially when it comes to words originated from Latin, it is common to change words with the addition or removal of certain parts -- the affixes. Notice, for example, that to transform "vulnerable" into a noun, we added a suffix (an ending): "vulnerability". On the other hand, to transform "censorship" into an adverb, we changed suffixes: "censorious". It is important to know and understand the use of affixes. They are a helpful means to figure out the meanings of new words.
