leash

(noun) restraint consisting of a rope (or light chain) used to restrain an animal. Synonyms: tether, lead.

(noun) the cardinal number that is the sum of one and one and one. Synonyms: three, 3, III, trio, threesome, tierce, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace.

(noun) a figurative restraint. Synonyms: collar. Examples: "Asked for a collar on program trading in the stock market." "Kept a tight leash on his emotions." "He's always gotten a long leash."

(verb) fasten with a rope. Synonyms: rope. Example: "Rope the bag securely."