Pronunciation: [kˈe͡ɪsən] (IPA) 
The word "caisson" is spelled with two S's, not one. The correct IPA phonetic transcription for this word is /keɪˈsɒn/. The first syllable is pronounced like "K" followed by "ay." The second syllable is pronounced like "sohn." The two S's in the spelling represent the "s" sound in the second syllable. It is important to use correct spelling and pronunciation to avoid confusion in communication.
A caisson is a large, watertight structure that is used in construction and engineering projects to enable work to be carried out underwater. It is typically cylindrical or rectangular in shape and made of reinforced concrete or steel. The caisson is designed to be sunk into the ground or water and reach the desired depth where construction work needs to take place.
The process of sinking a caisson involves removing the internal soil or water by using air pressure, dredging, or pumping. This creates a dry environment within the structure, allowing workers to carry out various tasks such as excavation, foundation construction, or repairs.
Caissons are commonly used in the construction of bridges, piers, and other marine structures. They provide a stable working environment and prevent water or soil from entering the construction area. Once the construction work is completed, the caisson can be filled with concrete or backfilled with soil to secure the structure.
The term "caisson" can also refer to a wheeled cart or wagon used to transport ammunition, artillery, or supplies during military operations. In this context, it is typically a heavily reinforced vehicle to withstand the rigors of combat.
Overall, caissons play a vital role in construction and military operations, enabling work to be carried out in challenging underwater or combat situations.
A wooden box filled with military stores; an ammunition-waggon; a wooden frame used in laying foundations in water.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "caisson" can be traced back to the French language. It originated from the French word "caisson", which means "big box" or "chest". The term was first used in the field of engineering and architecture to refer to a watertight structure used in construction projects, particularly underwater construction or in the building of tunnels. Over time, the term "caisson" was adopted into the English language with the same meaning and is commonly used to denote a watertight structure used in construction or transportation, such as a floating caisson or a caisson used for sunken foundations.
