You can use utmost to emphasize the importance or seriousness of something or to emphasize the way that it is done. It is a matter of the utmost urgency to find out what has happened to these people. Security matters are treated with the utmost seriousness.

How do we use utmost?

Additionally, utmost is used as a noun to refer to the highest attainable point or degree, as in "The hikers pushed themselves to the utmost to get to camp before dark" or "The inn provides the utmost in comfort and luxury." The noun also often occurs in phrases such as "to do one's utmost" or "to try one's utmost," ...

How do you use utmost in a sentence?