persuader

noun5

1. •
   One who, or that which, persuades, literally or figuratively.
2. •
   (informal, euphemistic) A hammer; any tool used improvisationally to strike a recalcitrant object.

   • It's true that a good worker doesn't misuse a hammer, and it's also true that a good worker knows that sometimes using a persuader to expedite a task is appropriate for efficiency.
3. •
   (informal, historical) A tool used to pack the type into the form.

   • Next fit the quoins, using the “persuader” to squeeze in the pages, and tap up all around. — 1898
4. •
   (slang) A spur (for riding a horse).
5. •
   An electrode that directs electrons into a multiplier.

   • These electrons are guided to the second dynode by the resultant electric field of this dynode and the persuader. — 1953