Why this matters
The knife, food, board, and guiding hand work as one system. If any part slides, wobbles, or leaves fingertips exposed, the motion is no longer controlled. Even pieces also cook at a similar rate, so safe knife work improves texture as well as appearance. Work below your maximum speed; smooth repetitions build useful pace naturally.
How to do it
Turn the fingertips of the hand holding the food inward, with the thumb tucked behind them. Let the side of the knife touch the front knuckles lightly as those knuckles move backward.
What to look, hear, or feel for
You should see knuckles closest to the blade, not fingertips. Move slowly enough that the guiding hand and knife stay coordinated.
When something goes wrong
If the ingredient becomes too small to hold safely, stop. Lay it flat, switch to a smaller knife, use a holder designed for the task, or accept a slightly larger final piece.
Try it in a real meal
Practice with one sturdy vegetable at a time, without a hot pan waiting, and stop whenever the setup feels unstable.