brave
The French word 'courageux' is an adjective used to describe someone who possesses courage or bravery. It can be used in situations similar to its English counterpart 'brave', for instance in situations involving danger or requiring courage.
The lion is a very brave animal.
This sentence is a simple declarative sentence that states a fact about lions, using 'courageux' as an adjective to describe the lion's character.
To be a leader, you must be brave.
This sentence uses 'courageux' as a characteristic requirement of being a leader. The verb 'être' (to be) is used in combination with 'courageux' to express this necessity.
You were brave during the operation.
In this sentence, 'courageux' is used to describe the person's behaviour ('vous' - you) during a specified period of time (during the operation), further explained by the context of the phrase.