a mill that mixes or kneads clay with water to form a malleable mass or paste
Native clay is dug, dried, ground to a powder, mixed with water and blended in apug mill.
pug mill in American English
noun
a mill for grinding and mixing materials, as clay or the ingredients of cement, to a desired condition
Word origin
[1815–25]This word is first recorded in the period 1815–25. Other words that entered Englishat around the same time include: aesthetic, artifact, pullout, treadmill, welterweight