*Is tempted to just copy and paste the CE submission*
Must...resist...laziness!
Okay, Arid Release is a combination of Fire and Wind chakra. Its used to create heat waves and remove moisture from the environment. In this respect it can be thought of as similar to Scorch Release, but without the manifestation of flames. Instead of focusing on direct destructive power like other elements, its used to induce conditions and exhaustion on the enemy such as dehydration, dizziness or even heat stroke.
Its weak to earth or other strong physical elements as someone shielded by an earth technique would be able to maintain the current environment around them. This keeps moisture locked where it is and prevents the removal of moisture. Its other weaknesses are elements that are hotter than it such as fire or fire based CEs. These elements are able to overpower the Arid techniques.
Its strong against water as its main purpose is to remove moisture. The heat created by Arid Release can evaporate large amounts of water in seconds. Wind is another element that's weak to Arid because it can have its moisture removed and temperature changed causing the wind itself to stabilize and dissipate. Some other elements that its strong against are Ice, Wood, Rain, Suigetsu?, Boil, Steam, etc. for the reasons stated before.