Once you've met あまり and 全然, you know the pattern: some adverbs come pre-committed to a negative — say them, and a 〜ない must follow. This page adds three more members of that negative-polarity family, but with a twist that makes them far more expressive than a bare "not." Each one injects a specific attitude into the negation: なかなか adds thwarted expectation ("it won't, though I'm waiting"), 別に adds indifference ("nothing worth mentioning"), and めったに adds rarity ("almost never"). They are not interchangeable intensifiers — swap one for another and you change how the speaker feels, not just how much. This page is about that structural demand for a ない and the flavour each adverb carries; the pure frequency ranking of めったに sits on the frequency page.
Three adverbs, three attitudes — all binding a 〜ない
| Adverb | With 〜ない | Attitude it adds |
|---|---|---|
| なかなか | not readily, won't (however I try) | thwarted expectation, impatience |
| 別に | not particularly, nothing in particular | indifference, deflection |
| めったに | rarely, hardly ever | near-total rarity |
なかなか〜ない — "it just won't," against your expectation
なかなか〜ない is the adverb of frustrated waiting. It says the thing you expected — hoped, assumed — to happen simply isn't happening, no matter how long you wait or how hard you try. There's impatience baked in.
予約したのに、料理がなかなか出てこない。
yoyaku shita noni, ryōri ga nakanaka dete konai
We reserved, and yet the food just won't come out.
この仕事、なかなか終わらない。
kono shigoto, nakanaka owaranai
This job just won't get finished.
赤ちゃんが夜なかなか寝なくて、疲れた。
akachan ga yoru nakanaka nenakute, tsukareta
The baby just won't go to sleep at night, and I'm worn out.
Here is the structural twist that makes なかなか special, and it's a favourite exam trap: なかなか flips meaning by polarity. With a negative, it means "not readily" (frustration). With a positive, it means "quite / considerably / pretty good" (mild admiration). Same word, opposite feeling, decided entirely by whether a ない follows.
このラーメン、なかなかおいしいね。
kono rāmen, nakanaka oishii ne
This ramen is actually pretty good.
別に〜ない — "not particularly," the great deflector
別に〜ない means "not especially, nothing in particular." Its social job is deflection: it softens or brushes off, signalling that whatever you're negating isn't a big deal, isn't worth dwelling on.
別に問題ないよ。気にしないで。
betsu ni mondai nai yo. ki ni shinaide
It's no problem really. Don't worry about it.
別に嫌いじゃないけど、そんなに好きでもない。
betsu ni kirai ja nai kedo, sonna ni suki demo nai
It's not that I dislike it — I just don't love it either.
別に also functions as a one-word reply, with the ない implied rather than spoken. And here's the catch English speakers miss: a curt 「別に。」is not emotionally neutral. Depending on tone, it reads as evasive, guarded, or downright sulky — it's the classic teenager's non-answer.
「どうしたの？」「別に。」
dō shita no? betsu ni
'What's wrong?' 'Nothing.' (evasive / sullen)
So 別に is a two-edged tool: warm and reassuring in 別に問題ないよ, but cold and shutting-down as a bare 「別に。」 Read the tone before you read the word.
めったに〜ない — "hardly ever"
めったに means "rarely, hardly ever," and like its siblings it must be finished with a negative. It states near-total rarity — the event does happen, but so seldom it's remarkable.
父はめったに怒らない。
chichi wa metta ni okoranai
My father hardly ever gets angry.
彼女はめったに外食しない。
kanojo wa metta ni gaishoku shinai
She rarely eats out.
There's a high-frequency set phrase built on it: めったにない ("rare, exceptional"), literally "there hardly ever is."
こんなチャンスはめったにない。逃さないほうがいい。
konna chansu wa metta ni nai. nogasanai hō ga ii
A chance like this rarely comes along. Best not to let it slip.
Where めったに sits on the frequency ladder (against いつも, よく, 時々, たまに) is the subject of the frequency page; here the point is just that it's another adverb locked to a ない.
Why they're not interchangeable
Because each adds a different attitude, choosing the wrong one distorts your meaning even when all three "mean not." Compare:
- 彼はなかなか来ない — he's not showing up (I'm waiting, impatient; a one-off)
- 彼はめったに来ない — he rarely comes (a habitual pattern of rarity)
- 彼は別に来ない — (oddly, needs context) — 別に doesn't fit a plain "come" well; it wants an evaluative predicate (別に来たくない "I don't particularly want to come")
That contrast between なかなか (this time, frustratingly) and めったに (as a rule, seldom) is the one learners most often blur — see Mistake 3.
Common mistakes
Mistake 1 — Pairing them with a positive verb. All three demand a negative; めったに and 別に especially are meaningless without it.
❌ 父はめったに映画を見る。
Wrong — めったに requires a negative: めったに映画を見ない ('rarely watches films').
✅ 父はめったに映画を見ない。
chichi wa metta ni eiga o minai
My father rarely watches films.
Mistake 2 — 別に with a positive predicate. "Not particularly" needs its ない; 別に + positive is broken.
❌ 別に眠い。
Wrong — 別に needs a negative: 別に眠くない ('not particularly sleepy').
✅ 別に眠くない。
betsu ni nemukunai
I'm not particularly sleepy.
Mistake 3 — Using なかなか for habitual rarity. なかなか来ない is "he's not coming (right now, and I'm waiting)," a one-time thwarted expectation — not "he seldom comes." For habitual rarity, reach for めったに.
❌ 彼はなかなか会社に来ない。（意味：めったに来ない）
Misleading — this reads 'he's taking forever to show up today,' not 'he rarely comes.' For habitual rarity use めったに.
✅ 彼はめったに会社に来ない。
kare wa metta ni kaisha ni konai
He rarely comes into the office.
Mistake 4 — A curt 別に to someone you should be polite with. A bare 「別に。」 sounds sullen; to a boss or teacher it comes off as rude. Soften it.
❌ （上司に）「体調はどう？」「別に。」
Too curt — a bare 別に sounds sulky to a superior. Expand it politely.
✅ （上司に）「特に問題ありません。ありがとうございます。」
toku ni mondai arimasen. arigatō gozaimasu
No particular problems. Thank you.
Key takeaways
- なかなか / 別に / めったに all bind a 〜ない and each adds an attitude: thwarted expectation, indifference, rarity.
- なかなか is polarity-sensitive: with a positive it means "quite / pretty good"; with 〜ない, "won't, however I try."
- 別に deflects — reassuring in 別に問題ない, but a bare 「別に。」can sound sulky; mind the tone.
- めったに〜ない = "hardly ever," with the set phrase めったにない ("rare"). Its place on the frequency scale is on the frequency page.
- They are not interchangeable: なかなか来ない (this time) ≠ めったに来ない (as a rule).
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Start learning Japanese→Related Topics
- あまり〜ない / 全然〜ない: Degree NegationN4 — Two adverbs that are grammatically incomplete on their own — あまり ('not very') and 全然 ('not at all') set up a degree that a downstream 〜ない must land; this page is about the bound structure and where that negative attaches.
- Frequency: たまに / めったに / 全然N4 — The rare end of the frequency ladder — positive たまに 'occasionally' versus the negative-polarity めったに〜ない 'rarely' and 全然〜ない 'not at all', which demand a negative verb.