Gayn-Vav-Ta / غوط
Gayn-Vav-TaغوطgwT
enter/sank into a thing, become hidden/descended/sloped in the ground, dug/excavated/hollowed out, make deep, cavity/pit, Lane gives the example of 4:43 & 5:6 to mean 'place in which one satisfies a want of nature' (i.e. toilet), human excrement.