Plural of chassis, the framework or structural base of a vehicle or device.
From French 'châssis,' derived from Latin 'capsa' (box or case). The spelling shifted through French evolution, and the word entered English in the late 17th century to describe the underlying frame structure of carriages and vehicles.
The word chassis comes from the same Latin root as 'case,' and just like a case holds things inside, the chassis holds all the car's important parts! This Latin word 'capsa' gave us dozens of English words like 'capsule' and 'encapsulate.'
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