a substance such as coal, gas, or oil that can be burned to produce heat or energy

燃料:

The plane was running low on fuel.

飞机燃料告急。

Coal is one of the cheapest fuels.

煤是最廉价的燃料之一。

the car's fuel consumption (=how much fuel it uses to travel a particular distance)

该车的油耗

an empty fuel tank

空油箱

[T] to make something, especially something bad, increase or become stronger

使恶化; 使更强烈:

His words fuelled her anger still more.

他的话火上浇油，使她更愤怒了。

Progress was slow, fueling concerns that the stadium would not be finished on time.

进度很慢，加深了人们对体育馆能否按时完工的担忧。

also fuel up [I,T] if you fuel a vehicle or if it fuels up, fuel is put into it

（给车辆）加油，加燃料:

We'd better fuel up at the next town.

我们最好在下个小镇加油。

The van was fuelled and waiting in the basement car park.

小货车加好了油，在地下停车场等着。