The Chinese word "车臣" is formed through phonetic transcription, where the characters are chosen solely for their sound to approximate the foreign name "Chechnya". The character "车" (chē) corresponds to the "che" sound, and "臣" (chén) corresponds to the "chen" sound, creating a combined pronunciation that mirrors the original term. This process results in a written form that represents the name audibly within the Chinese language system.