Main Entry: ¹teth·er

Pronunciation: \ˈte-thər\

Function: noun

Etymology: Middle English tethir, teder, probably of Scandinavian origin; akin to Old Norse tjōthr tether; akin to Old High German zeotar pole of a wagon

Date: 14th century

1 : something (as a rope or chain) by which an animal is fastened so that it can range only within a set radius
2 : the limit of one's strength or resources <at the end of my tether>