This is the 5350th most frequent Japanese word.
nomen
"Nomen" in Japanese refers to "noodles."
In this sentence, the word "多面" (tamen) refers to a polyhedral shape or having multiple faces.
私はその機械に多面体を使いました。
I used a polyhedron with that machine.
Here, the word "多面性" (tamensei) conveys the concept of having multiple aspects or versatility.
経済学では、多面性が重要です。
Multiplicity is important in economics.
In this usage, "多面的" (tamanteki) describes an approach that considers multiple perspectives or aspects regarding an issue.