The word "约瑟" is formed as a phonetic transliteration for the name "Joseph", where the character "约", constructed from the radical "糸" (silk) and the component "勺" (spoon) to historically denote binding or agreement, approximates the sound "Yo", and the character "瑟", formed from the radical "珡" (related to music) and the component "必" (must) to represent an ancient stringed instrument, approximates the sound "se", with their individual meanings disregarded in this context to collectively replicate the foreign name's pronunciation.