赶赴
gǎn fù · HSK 7
to hurry
🏃💨 赶 = hurry/chase + 赴 = head toward; together: rush to a destination
赶 carries the sense of chasing or urging on (also seen in 赶快 hurry up), while 赴 means to go to or attend (as in 赴约 keep an appointment). Combined, 赶赴 specifically means rushing to reach somewhere on time.
赶 — walk radical 走 + 旱 (gan, phonetic)
赶 combines 走 'to walk/run' as the meaning component with 旱 as the phonetic clue for the sound gǎn. The walking radical points to its core meanings: to hurry, to chase, or to drive (animals) along. The simplified form replaced the older 趕, which used 倝 as phonetic.
赴 — 走 'walk/run' + phonetic 卜
A semantic-phonetic compound: 走 (run, hurry) gives the meaning of going somewhere quickly, while 卜 supplies the sound. Originally meant to rush toward or hasten to a place, and still carries that sense of going to attend something, as in 赴会 'attend a meeting'.