Translation
I will give my dagger a turn around your arm. And for this reason, you will not take the dagger away from me. And also with this turn there is no doubt I will strike it into your chest.
Explanation
With your opponent acting as the 1st Master, they have grabbed your wrist and are attempting to bring it under control by pulling it in a tight arc which goes to the outside of the body and downward.
Rather than resisting this, allow your arm to be carried along, and build on the momentum it generates. Roll your wrist in a clockwise motion lifting your dagger tip over the top of your opponents forearm as shown. Allow this movement to expand into your own forearm and then drive your dagger under your opponents arm. Your wrist will break out of your opponents grip in the gap between their little finger and the base of their thumb, and will slide straight into their ribcage.