σηκός

Etymology
Commonly connected with. However, the alternation rather points to origin.

Noun

 * 1) pen, fold, especially for rearing lambs, kids and calves
 * 2) sacred enclosure, precinct, dedicated to a hero
 * 3) sepulchre, burial place, enclosed and consecrated
 * 4) stump of an old olive tree
 * 5) weight in the balance