persuader
n.— «Persuader. Large hammer used on work require great pressure.» —“Add Machinists” by Mendelowitz Lexicon of Trade Jargon , 1938-39. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...