IPA: /ɪnˈkɜːrʒən/
KK: /ɪnˈkɜrʒən/
An aggressive or hostile entry into a place, often involving invasion or raid.
The army launched an incursion into enemy territory to gather intelligence.
Incursion is formed from "in-" (meaning into) and "currere" (meaning to run). The word describes the act of running into or entering a place, often with a connotation of invasion or attack.
Think of 'running into' a place ('in-' means into and 'currere' means to run) — that's why incursion refers to entering, often in a forceful way.