Adverb
Adjective (な)
Usually written in kana
1. very; considerably; easily; readily; fairly; quite; highly; rather
うん、なかなか可愛い。Yeah, quite cute.
Adverb
Usually written in kana
2. by no means; not readily
with a verb in the negative
それでもなかなか言葉が出てこない。Even so, the words do not readily come out.
3. middle; half-way point
Adjective (の)
Usually written in kana
4. excellent; wonderful; very good
なかなかの腕をお持ちなのだとか。I hear that you have quite excellent skills.