This is the 369th most frequent Japanese word.
なんか
"なんか" is a casual expression meaning "something like," "things like," or "somehow."
Here, 'なんか' is used colloquially to mean 'somehow' or to emphasize a curious or unexpected situation.
なんかいいことあったの?
Did something good happen?
In this case, 'なんか' conveys a feeling of vagueness or an informal observation.
え、なんか変だね。
Huh, that's kind of strange.
Here, 'なんか' forms part of the word for exemplification, showing its functional flexibility.