The word 没什么 is formed by directly combining the negation 没 (meaning "not have" or "without") with the question word 什么 (meaning "what"). This fusion creates a new, fixed expression where the original interrogative sense of "what" is absorbed and neutralized by the preceding negation. The combined unit no longer asks a question but instead functions as a single idea to dismiss the importance or existence of something, effectively meaning "it's nothing" or "it doesn't matter". Its formation is a straightforward example of two common and concrete characters merging to create an abstract, idiomatic phrase whose meaning is more than the simple sum of its parts.