hesitate say, be reluctant speak
訒 centers on hesitation in speech: being reluctant to speak or pausing before saying something.
訒 combines 言 (speech) with 刃 (blade), likely suggesting speech that is held back or hesitant, as if words are cut off. The exact historical development is uncertain.
Words (言) meeting a blade (刃) can make someone hesitate to speak, as if the sharp edge cuts off their words.
For ジン, imagine a person named Jin who always hesitates before speaking, pausing at the edge of every sentence: Jin -> ジン.