The word "赶赴" is formed by combining the character "赶", meaning to rush or hurry, which itself is composed of the radical "走" indicating movement and the component "干" serving as a phonetic clue, with the character "赴", meaning to go to or attend, composed similarly with the radical "走" for movement and "卜" as a phonetic element; together, they create a compound verb where "赶" imparts a sense of urgency and "赴" specifies the action of proceeding to a location, thus denoting the meaning of hurrying to a destination.