run away
駾 centers on fleeing or escaping quickly, specifically running away. The meaning is narrow and concrete: a hurried departure, often on horseback.
駾 combines 馬 (horse) with 兑, which likely contributes the sound. The character expresses running away, originally with the nuance of a horse bolting or fleeing.
A horse (馬) on the right side 兑 looks like it's kicking up dust as it bolts. Picture a startled horse running away at full speed.
For タイ, imagine a horse running away so fast it leaves a tie-shaped dust trail behind: tie -> タイ, and the horse flees.