1.

ambi-more than one; both

ambiguous- open to more than one interpretation or doubtful or uncertain.

ambidextrous-able to use both hands equally.

2.

pro-many, much

prolific- producing offspring or fruit in great abundance; fertile or producing or characterized by abundant works or results.

pro-, prot- chief, first, primitive

protagonist-the main character in a drama or other literary work .

-in ancient Greek drama, the first actor to engage in dialogue with the chorus, 

in later dramas playing the main character and someminor characters as well.

proponent-a person who argues in favor of something  -a person who puts forward a proposition or proposal.

3.

op-, ob- against, in the way

opponent-one that opposes another or others, as in a battle, contest, or debate.

obstacle-something that stands in the way of or holds up progress.

4.

com- together, common

comprehensive-marked by or showing extensive understanding.(adj.)

comprehend-to take in the meaning, nature, or importance of; grasp.(v.)

reprehend-to find fault with; criticize.

5.

audi- to listen

audience-people who listen to a program.
audible-loud enough to be heard.

audiovisual-relating to sound and vision.

6.

spect- to look

spectator- a person viewing anything; onlooker; observer

speculate-to engage in a course of reasoning often based on inconclusive evidence; 

conjecture or theorize.

perspective-an understanding of how aspects of a subject relate to each other and to 

the whole.

inspector-a person who inspects, esp an official who examines for compliance with 

regulations, standards, etc.

7. cir- round

circulation-movement in a circle or circuit, especially the movement of blood 

through bodily vessels as a result of the heart's pumping action.

circus-a public entertainment consisting typically of a variety of performances by 

acrobats, clowns, and trained animals.

8.

in favor of-like

go Dutch- to pay one's own expenses on a date or outing.

RIP= Rest In Peace