air shaft (noun)

1. The painting featured an air shaft in the background, symbolizing the importance of fresh air and ventilation.

2. In the ancient temple, the air shafts were considered sacred and believed to allow the divine energy to flow into the worship area.

3. The superhero used the air shaft as a secret passage to enter the enemy's lair undetected.

4. In the animated show, the mischievous character always found a way to cause trouble by climbing up the air shafts.