allow, permit, yield, concede
讓 centers on stepping back or giving way: allowing, permitting, yielding, or conceding something to another person.
讓 combines 言 (speech) with 襄, which likely contributes the sound and may carry a sense of yielding or assisting. The character expresses yielding through words.
The left side 言 (words) and the right side 襄 (a shape associated with helping or yielding) together suggest using words to step back: allowing, permitting, or conceding.
For ジョウ, imagine a person named Joe who always yields: Joe -> ジョウ, and his words (言) let others go first.