Which word uses the prefix pro-, which means before, in the same way pro-is used in prolonged in the sentence below.
"I looked away, for a prolonged stare can be interpreted as a threat."

Which suffix can be added to the verb observe to form a noun that means "the -process of observing"?

Which suffix can be added to the verb impress to form a noun that means "an effect produced on the mind"?

John Henry says "I will not quit," during the eighth hour of the contest.  Which of these words is the best synonym to replace quit in the sentence?