General opposites:
* Prétentieux: This translates to "pretentious" and is a common opposite of humble.
* Arrogant: This word is also a good translation for the opposite of humble.
* Haughty: This implies a sense of superiority and disdain.
* Vaniteux: This means "vain" and emphasizes excessive pride in one's appearance or abilities.
More specific opposites:
* Ambitieux: This means "ambitious" and can be considered the opposite of humble if it is driven by a desire for power or recognition.
* Dominateur: This means "dominating" and implies a desire to control others, which is often the opposite of a humble attitude.
The best French word to use will depend on the specific context and the nuance you want to convey.