I wonder what this could be for?

Question 1

root word in:

Answer 1

not

Question 2

root word auc:

Answer 2

increase

Question 3

root word brev:

Answer 3

short

Question 4

root word cas:

Answer 4

to fail

Question 5

root word carn:

Answer 5

flesh

Question 6

invalid

Answer 6

adj - not valid; without force or foundation; indefensible; void; weak.

Question 7

auction

Answer 7

noun - a publicly held sale at which property or goods are sold to the highest bidder.

Question 8

abbreviation

Answer 8

noun - a shortened or contracted form of a word or phrase

Question 9

cascade

Answer 9

noun

1. a waterfall descending over a steep, rocky surface
2. anything that resembles a waterfall, as in seeming to flow or fall abundance.

Question 10

carnivore

Answer 10

noun - an animal that eats flesh.

Question 11

casualty

Answer 11

noun - any person, group, thing, etc., that is harmed or destroyed as a result of some act or event.

Question 12

carnage

Answer 12

noun - the slaughter of a great number of people, as in battle.

Question 13

brevity

Answer 13

noun - the quality of expressing much in a few words; terseness, briefness.

Question 14

innocous

Answer 14

adj - not likely to irritate or offend; not harmful.