situs (n.)

"place or position occupied by something," especially with reference to environment, also "land on which a building stands, location of a village," late 14c., from Anglo-French site, Old French site "place, site; position," and directly from Latin situs "a place, position, situation, location, station; idleness, sloth, inactivity; forgetfulness; the effects of neglect," from past participle of sinere "let, leave alone, permit" (from PIE *si-tu-, from root *tkei- "to settle, dwell, be home").

1740, Latin, literally "in its (original) place or position," from ablative of situs "site" (see site (n.)).

Proto-Indo-European root meaning "to settle, dwell, be home."

It forms all or part of: Amphictyonic; hamlet; hangar; haunt; home; site; situate; situation; situs.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kseti "abides, dwells;" Armenian shen "inhabited;" Greek kome, Lithuanian kaimas "village;" Old Church Slavonic semija "domestic servants;" Old English ham "dwelling place, house, abode," German heim "home," Gothic haims "village."