This is the 2477th most frequent French word.
volcan
A mountain or hill with an opening through which lava, ash, and gases are expelled from Earth's interior.
The word 'volcan' refers to a physical mountain or geological formation that can erupt.
Le volcan est en éruption.
The volcano is erupting.
Here, 'volcans' is used in its plural form to refer to volcanoes in general as a topic of study.
Nous avons étudié les caractéristiques des volcans.
We studied the characteristics of volcanoes.
In this sentence, 'volcan' is used metaphorically to describe a person's passionate and potentially unstable nature.