1. Week 18 Root: Cat(a) Meaning: Down

2. Catacomb (n)
Definition: An underground cemetery Sentence: I walked down the stairs and found myself underground in a catacomb filled with bones and dead bodies.

3. Catalyst (n)
Definition: event that quickly causes action. Sentence: The surprise bombing attack was the catalyst that caused the war.

4. Catalogue (v)
Definition: Writing down a complete list of items in order. Sentence: Ms Paris and her friend catalogued a list of activities they wanted to do in 2015.

5. Catastrophe (n)
Definition: a disaster Sentence: Hurricane Sandy was a catastrophe that caused damage and destruction to thousands of people.

6. Cataract Definition: A large waterfall or rapids.
Sentence: Nigel was hiking when he saw a beautiful cataract that splashed him with water on the hot day.

7. Catastrophic (adj)
Definition: Extremely harmful; bringing ruin. Sentence: I made my mom mad, but avoided catastrophic results by apologizing and giving her flowers.

8. Catatonic (adj)
Definition: Showing an unusual lack of movement, activity, or expression.
Sentence: After a particular brutal battle in the war the solider was in a catatonic state and couldn’t move.

9. Apply (v)
Definition: use for a specific purpose Sentence: Apply a new word you learned by using it in your writing. *like in your sentences right now

10. Manipulate (v)
Definition: control it or move it around for a specific purpose
Sentence: Manipulate time in a narrative by using flashbacks.

11. Compile (v) Definition: you collect information and put it together
Sentence: Before finishing the report compile a list of all the sources you used.