AWL 3

7. a reason for doing something, especially one that is hidden or not obvious.
9. a particular level of rank, quality, proficiency, intensity, or value.
10. be a sign of; indicate.
12. not helping or supporting either side in a conflict, disagreement, etc.; impartial.
13. (especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough.
15. the subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic.

1. hinder, restrain, or prevent (an action or process).
2. quote (a passage, book, or author) as evidence for or justification of an argument or statement, especially in a scholarly work.
3. having limits or bounds.
4. permission for something to happen or agreement to do something.
5. commit oneself to and begin (an enterprise or responsibility); take on.
6. a relationship between people or groups based on shared feelings, interests, or experiences.
8. be a significant cause or basis of (something) even if not necessarily manifest or obvious.
11. the manner in which a person behaves, especially on a particular occasion or in a particular context.
14. move backward.