As a unit of time:
* seconde (feminine) - This is the most common way to say "second" when referring to a unit of time.
As an ordinal number:
* deuxième (masculine) - This is the correct word for "second" when referring to position or order.
Other:
* deux (masculine) - This word means "two," but it can also be used to mean "second" in certain contexts, such as "second floor" (deuxième étage) or "second chance" (deuxième chance).
Here are some examples:
* Une seconde (one second)
* La deuxième fois (the second time)
* Le deuxième étage (the second floor)
Remember to use the correct gender when referring to "second," as French is a gendered language.