IPA: /ɪnˈkæmpmənt/
KK: /ɪnˈkæmpmənt/
A place where people set up tents or temporary shelters to live or stay for a while, often used by groups like soldiers or travelers.
The hikers found a perfect spot for their encampment near the river.
Encampment is formed from "en-" (meaning to cause to be in) and "camp" (from Latin "campus", meaning field or open space) and "-ment" (a suffix used to form nouns indicating an action or resulting state). The word refers to the state or action of being in a camp or setting up a temporary place to stay in a field.
Think of 'causing to be in' ('en-') a 'field' ('camp') — that's why encampment means the act of setting up a temporary place in a field.