late slow, dilatory, tardy, to delay, dull, stupid
赿 centers on slowness and delay, extending to dullness or stupidity as a result of being slow to act or think.
赿 combines 走 (run) with 氏, which likely contributes the sound. The exact historical development is uncertain, but the character is associated with slowness or delay.
The running enclosure 走 suggests movement, but the inside 氏 looks like a person sitting down, causing delay. Imagine someone who should be running but is instead sitting, making them late and slow.
For チ, picture a cheetah that is unusually slow and dull, delaying the chase: cheetah -> チ, but this one is tardy.