I have reached a stage in life when I can no longer see my brows to pluck them.  I went into a salon to get my brows either plucked or waxed so I would look okay for a school event.  They do not pluck or wax, they thread.  The person holds one end of a twisted thread in her mouth.  In the middle where the threads are twisted,  the threads are moved across the face plucking hairs as they move.  Ouch!

I looked it up, it is an ancient way of removing hair from the body that reportedly comes from India.

One thing about it, it last much longer than either plucking or waxing.  How about that!