Paraffin; Flammable Liquid Derived From Petroleum
Puzzle 16 of Energy Sources Hard Pack
Question is: Paraffin; Flammable Liquid Derived From Petroleum
and the answer is: KEROSENE
Word Meaning:
KEROSENE — A thin, often colorless or blue or straw-colored petroleum-based fuel, heavier than gasoline/petrol or naphtha but lighter than diesel, used primarily as jet fuel but also for heating and lighting in some remote or impoverished areas.
Definitions from Wiktionary.