なんか Nanka is a very difficult word to translate to English.
なんかない Nanka Nai ... Is there anything?
なんかつかれた Nanka Tsukareta ... I do not know why but I am tired.
なんかくれ Nanka Kure ... Give me something.
なんかさ〜 Nanka Sa~ ... Somewhat / Do you know what I mean?