is there a word meaning 'a loop' or 'a trap' sounds like 'la soo'?

Gary C2016-06-05T21:59:33Z

Yes. Lasso (from the Spanish word lazo, meaning a knot or a loop of rope).
A cowboy's lasso is a loop of rope used to catch and hold cattle, horses, and sometimes other things.

chris2016-06-05T20:28:26Z

Lasso is a thing cowboys would use to loop around a cows head. To lasso something is to loop a rope around it

Kini2016-06-05T21:06:53Z

lasso (pronounced lassu)