Pestle

Cannot be auctioned, traded, or bazaared, but can be delivered to a character on the same account.
Can be obtained as a random reward from the Gobbie Mystery Box Special Dial and similar sources.

Pestle is derived from the classical Latin "pestillum", meaning "pounder". It's often coupled with the word "mortar" which together are a tool used to crush, grind, and mix substances, often used in cooking, alchemy, and chemistry.