The word "夙愿" is formed by combining the character "夙", which means "early" or "long-standing", and the character "愿", which means "wish" or "desire". "夙" originates from a pictorial representation of early morning activity, often involving elements like "夕" (evening) and a hand, to imply something ancient or prolonged. "愿" includes the component "心" (heart) to signify a heartfelt aspiration. Together, they create a compound word where "夙" modifies "愿" to express a wish that has been cherished for a long time.