The phrase "than with someone" is a prepositional phrase that indicates comparison. When used in a sentence, it means to compare something or someone to another person rather than comparing them directly. For example, if I were to say "She's smarter than her sister," the meaning would be clear - she is more intelligent than her sibling. However, if I were to use the phrase "than with someone" in that sentence it would read: "She's smarter than with her sister." This phrasing implies a comparison between two individuals rather than comparing one person directly to another.