Elevation, or geometric height, is mainly used when referring to points on the Earth 's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
disquiet - disturb in mind or make uneasy or cause to be worried or alarmed; She was rather perturbed by the news that her father was seriously ill Synonyms: cark, disorder, perturb, unhinge, distract, trouble
The definition of barrage is a large volume of something, or a huge amount of things happening all at once. An example of a barrage is when 100 reporters all shoot questions at the president at the same time.