Artificial intelligent assistant

pimble-stone

pimble-stone, pimple-stone
  obs. nasalized var. of pebble-stone.

1577 Frampton Joyful News ii. (1596) 73 Pure Pimple stones of a brooke or Riuer. 1622 Malynes Anc. Law-Merch. 491 To lay little pimble stones vnder their tongue, to eleuate the same.

Oxford English Dictionary

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