sootproof

English

Etymology

soot +‎ -proof

Adjective

sootproof (not comparable)

  1. Resistant to soot.
    • 1921, Chilton's Motor Age: Volume 39, Part 2‎, Chilton Company, page 128:
      A spark plug which will stay sootproof and give long service in any of the Ford cylinders, must be a specially built plug.
    • 1914, The Autocar: Volume 33‎, London: Iliffe, Sons & Sturmey Limited, page 648:
      […] only a sootproof plug is of any use to a Mathis owner.

Alternative forms
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