IPA: /ɪnˈɡraʊnd/
KK: /ɪnˈɡraʊnd/
Referring to something that is located or constructed below the surface of the ground.
The inground pool was a popular feature in the backyard.
Inground is formed from "in-" (meaning in or within) and "ground" (from Old English "grund", meaning the surface of the earth or soil). The word "inground" refers to something that is set or located within the ground.
Think of something being 'in' ('in-') the 'ground' — that's why inground means something that is located within the earth.