1. the event of something being raised upward
2. the outer or the topmost boundary of an object
5. the bottom of the sea or ocean
6. to search into or travel in for the purpose od discovery
7. to examine or look at comprehensively.
9. complicated in structure; difficult; hard
10. a long, steep-sided valley on the ocean floor
11. to set free from confinement, restraint, or bondage
12. to remain suspended within or on the surface of a fluid without sinking.