He fell ill due to long-term malnutrition.

In math class, I learned about deficient numbers.

Recently, I've been feeling heavy-headed due to lack of sleep.

This plan is proceeding perfectly without any excess or deficiency.

Methane gas is one of the causes of global warming.

I renovated the kitchen to install a new gas stove.

We will use rare gases in this experiment.

The gas pipe is broken and gas is leaking.

Poison gas is leaking from that factory.

I used a gas burner in a chemistry experiment.