vocab

2. make changes in something established, especially by introducing new methods, ideas, or products.
4. an unpleasant hint or suggestion of something bad.
5. an electrical device allowing one-way or two-way communication
6. existing or taking place within, or administered into, a vein or veins.
8. a person who acts as a link between people in order to try to bring about an agreement or reconciliation; a mediator.
9. situated or done within the walls of a building.
12. (of a difficulty or obstacle) impossible to overcome.
13. crossed intricately together; interwoven.
14. occurring at irregular intervals; not continuous or steady.
15. well known for some bad quality or deed.
17. impossible to solve.

1. ask questions of (someone, especially a suspect or a prisoner) closely, aggressively, or formally.
3. impossible to understand or interpret.
6. the way in which two or more things have an effect on each other.
7. something) abruptly, especially as an aside or interruption.
10. existing or occurring within the boundaries of a state, esp. of the United States
11. delay or prevent (someone or something) by obstructing them; hinder.
12. endless (often used hyperbolically).
14. not harmful or offensive.
16. acting or done quickly and without thought or care.