An action taken in advance to protect against possible danger, failure, or injury; a safeguard: followed safety precautions when using heavy machinery. 2. Caution practiced in advance; forethought or circumspection: a need for precaution when planning a vacation.

Understanding the Context

Be sure to follow the usual safety precautions when cooking outdoors. When driving, she always wears her seatbelt as a precaution. Every home owner should take precautions against fire. She took the precaution of packing extra medicine for the trip.

Key Insights

Product names which are derived after an inventor's name will often remain capitalized, though not always (e.g. the petroleum distillate used to power trucks and locomotives is called "diesel" rather than "Diesel" even though it's named after the inventor of the four-stroke compression-ignition engine for which that fuel was formulated). I suppose a more realistic example is the development of powered pumps, locomotives etc. Newcomen's atmospheric engine did a vital job, but was bettered by Watt's improvements. Trevithick's locomotive of 1804 hauled a load, but modern diesel engines work far more efficiently and reliably.

Final Thoughts

// I'm not sure this is really an English language question. Even with uncountable nouns, for specific instances/types, we have nouns preceded by indefinite articles as in the following examples. It is cold outside! I could do with a hot tea! The old diesel What’s the difference between particulate and particle? Should it be diesel particulates or diesel particles, and why?

Could you provide three or more examples where it should use particulate rat... Gas is flammable, diesel vapour combustible. In England I was always taught that the difference between flammable and inflammable was that inflammable required a flame to permit burning.