Is First and foremost grammatically correct?

"First and foremost" is grammatically correct. It is a common idiom used to emphasize the importance of something.

Here's how it works:

* First: Adverb indicating priority or order.

* and: Conjunction connecting "first" and "foremost".

* Foremost: Adverb meaning "most important" or "most prominent".

Together, they create a phrase that emphasizes the significance of what follows.

Example: "First and foremost, we need to ensure everyone's safety."