anything worn or placed about the neck; "the thief was forced to wear a heavy wooden collar"; "a collar of flowers was placed about the neck of the winning horse"
首のまわりに着けられた、または首にかけられた
collar
a short ring fastened over a rod or shaft to limit, guide, or secure a machine part
a figurative restraint; "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"