button
The French word for button is "bouton". It is a masculine noun and is used in the same way as the English word button. It can refer to a physical button on a device, or a button on a piece of clothing. For example, "J'ai perdu le bouton de ma chemise" means "I lost the button on my shirt". In a more abstract sense, "bouton" can also refer to a call-to-action button on a website or app, similar to "click here" in English.
Press the red button.
This sentence can be used in a situation where you need to instruct someone to press a particular button, which is red in this case.
The button of his shirt is torn.
This sentence describes a situation where a button on someone's shirt is broken or torn.
Do not touch this button.
This sentence can be used when you wish to warn someone not to touch or press a particular button.