なかなか

なかなか
adverb
quite, rather; not easily
1. quite, rather, fairly (with affirmative)
To a considerable degree.
なかなかいい
It's quite good.
You're quite good.
The food at this restaurant is quite delicious.
This drama is quite interesting, and I look forward to it every week.
His explanation was quite easy to understand, so I could follow even difficult topics.
2. not easily, hardly (with negative)
Indicating difficulty or taking a long time.
なかなか()ない
They're not coming easily.
I can't easily remember it.
We're so busy that we can't easily meet, can we?
Japanese kanji are not easy to memorize.
I'm having trouble adjusting to my new job, and every day is tough.

なかなか changes meaning depending on whether the sentence is affirmative or negative.

WITH AFFIRMATIVES (quite, rather):

Expresses moderate praise or acknowledgment.

  • なかなかいい: quite good
  • なかなか上手(じょうず): fairly skilled
  • なかなか美味(おい)しい: pretty tasty

WITH NEGATIVES (not easily, hardly):

Expresses difficulty or that something takes time.

  • なかなか()ない: won't come easily
  • なかなか(おぼ)えられない: can't easily memorize
  • なかなか()えない: hard to meet

NUANCE:
In positive contexts, なかなか suggests "better than expected" or "surprisingly good." In negative contexts, it conveys mild frustration or resignation about difficulty.