the.com/intercept

means To stop or seize something while it's on its way from one place to another — catching a ball, a message, or a line before it reaches its destination.

from From Latin intercipere, a combo of inter- ('between') and capere ('to seize' or 'take') — the same capere that gives us 'capture' and 'captive.' So an interception was literally a 'seizing in the middle,' whether that's a soldier grabbing an enemy letter or, much later, a mathematician pinning down exactly where a line grabs the axis on its way across the page.