lariat

noun

1. a long, noosed rope used to catch horses, cattle, or other livestock; lasso.
2. a rope used to picket grazing animals.

noun US and Canadian

1. another word for lasso
2. a rope for tethering animals

n.1832, American English, from Spanish la reata “the rope,” from reatar “to tie against,” from re- “back” + atar “to tie,” from Latin aptare “to join” (see adapt).