bola

WordReference Random House Unabridged Dictionary of American English © 2019

bo•la  (bō′lə), n., pl.  -las (-ləz). 

1. Also,  bolas. a weapon consisting of two or more heavy balls secured to the ends of one or more strong cords, hurled by the Indians and gauchos of southern South America to entangle the legs of cattle and other animals.
2. Clothing See  bolo tie. 

• Latin bulla bubble, knob; see boil¹
• Old Provencal
• Spanish: ball
• 1835–45

Collins Concise English Dictionary © HarperCollins Publishers::

bola /ˈbəʊlə/, bolas /ˈbəʊləs/ n ( pl -las, -lases)

1. a missile used by gauchos and Indians of South America, consisting of two or more heavy balls on a cord. It is hurled at a running quarry, such as an ox or rhea, so as to entangle its legs

Etymology: Spanish: ball, from Latin bulla knob