IPA: /ɪnˈsɪʒən/
KK: /ɪnˈsɪʒən/
A cut made into body tissue or an organ, often during surgery.
The surgeon made a small incision to begin the operation.
Incision is formed from "in-" (meaning into) and "caedere" (meaning to cut). The word describes the act of cutting into something, typically used in medical contexts.
Think of 'cutting into' ('in-' means into and 'caedere' means to cut) when you remember that an incision is a cut made into something.