This is the 658th most frequent Arabic word.
الوقود
Fuel.
Here, 'الوقود' is used to mean fuel as a substance necessary for operation.
يحتاجُ المحركُ إلى الوقودِ ليعملَ.
The engine needs fuel to operate.
In this sentence, 'الوقود' refers to fuel in the context of commodities subject to economic factors.
خفَّضتْ الحكومةُ أسعارَ الوقودِ لتخفيف العبءِ الاقتصاديِّ على المواطنينَ.
The government reduced fuel prices to ease the economic burden on citizens.
Here, 'الوقود' is part of the phrase 'الوقود الأحفوري', referring to fossil fuels specifically, denoting sources of non-renewable energy.