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I just started playing the video game Mother 3, and if you try to examine the trash can in front of his house, Lucas says, 問題なし.

I expect this means something like, "no problem here", but I haven't been able to confirm that so far.

What kind of construction is the なし part?

2 Answers 2

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The basic meaning of なし is the same as ない, but its grammar is different.


Long ago, adjectives used to have separate sentence-final forms (with し) and pre-noun forms (with き). People gradually started using the き form at the end of sentences too, and eventually the /k/ dropped out, turning it into い:

 赤   root 
 赤し         sentence-final form                      (historical)  
 赤き                                   pre-noun form  (historical)  
 赤い         sentence-final form  AND  pre-noun form  (modern)

A few adjectives had the し ending built-in as part of the root. They conjugated pretty much the same way, except the sentence-final form didn't need an extra し added since one was already built-in:

 美し  root 
 美し         sentence-final form                      (historical)  
 美しき                                  pre-noun form  (historical)  
 美しい        sentence-final form  AND  pre-noun form  (modern)

The し ending is now lost for most adjectives, although you'll hear it sometimes when people quote the literary language. The き ending too is considered literary, but you'll probably recognize it from literary contexts such as song titles, where it's used to this day.


However, certain adjectives have fossilized forms available that are still used in modern Japanese as modern words, without the feeling that they're literary forms. なし is one of these. Etymologically, it's the same word as ない, but it should be distinguished in modern Japanese because its usage is different.

Of course, なし can be used more than one way, and some of those ways overlap with ない, which is unsurprising since they're historically the same word. Let's focus on the way it's used in 問題なし:

  1. It attaches directly to nouns without giving the impression that anything is omitted:

    問題なし

    Although phrases like 問題な are relatively common as well, I think 問題なし is significantly less common than 問題ない. It's probably best not to consider 問題なし as a case of ellipsis.

  2. なし is commonly treated as though it's nominalized, in which case it can be followed with the copula だ, genitive の, adverbial に, etc.:

    ○問題なしだ okay
    ×問題ないだ non-standard

    In this sense, we can say なし means ないこと. In this usage, it's often characterized as suffix-like or as forming compounds, but it can be treated as nominalized even when it's not attached to a noun, so "suffix" doesn't work as a complete description.

  3. It can be translated "no 〜" or "without 〜" in many cases.

    問題無し (literally "no problem[s]" / "without a problem")

Although なし can be treated as nominal, it doesn't have to be. You can use 「問題なし」 or 「異常なし」 and such as complete utterances, if you like. But any large dictionary should have plenty of examples where it's followed by particles that follow nominals such as だ・の・に・で・と. Let's take a look at some examples from 研究社 新和英大辞典:

  1. 休日なしで働く
    work without even a holiday

  2. アスピリン・砂糖なしの錠剤
    an aspirin-free, sugar-free tablet

  3. さあさあ、堅苦しいことはなしだ
    Relax. Stop being so formal.

  4. 断りもなしに休まれては困るね。
    If you take the day off without even telling me, it causes problems.

  5. 一歩後退の感なしとしない。
    One would be hard put to deny that things have taken a step backward.

  6. お互い隠し事はなしにしましょう。
    Let's not have any secrets between us.

There are plenty more! It's common to use なし this way, even though it was historically a sentence-ending form. One more usage of note is as a conjunctive form, similar to なく. Here's an example from Martin's 1975 Reference Grammar of Japanese, p.833:

今でもね、あたくしのうちっていうのは、ラジオはなし、黒白のぶっ壊れのテレビしかないんです。
Even now, you know, at my house there's no radio, there's just busted black-and-white television.

Personally, I suggest you memorize なし as having its own set of grammatical patterns in modern Japanese, and pay attention to how it's used. You'll find that certain phrases with なし are especially common, and your example of 問題なし is one of those.

(There's probably more to say about it, so watch for additional answers!)

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    This is incredibly detailed, which is why I've marked this as the accepted answer. Thanks!
    – waldrumpus
    Jul 23, 2014 at 9:30
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なし is the Old and Middle Japanese shuushikei form of what is now 無い. The modern shuushikei/rentaikei form (ない) is a descendent of the Old/Middle Japanese rentaikei form なき with the loss of the /k/. なし is still found in fossilised phrases (like your 問題無し), and sometimes on its own in intentionally archaic/dramatic speech.

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    Completely disagreed. なし is used way more often and nonintentionally than described in this answer. It is an everyday word.
    – user4032
    Jul 22, 2014 at 0:40
  • @非回答者 Do you disagree on the usage only or on the meaning as well?
    – waldrumpus
    Jul 22, 2014 at 6:30
  • I suppose I considered 「Xなし」 as a fossilised phrase for the purposes of this answer, though that's not entirely accurate, I suppose. I'm not aware of any other modern uses besides that, though.
    – Sjiveru
    Jul 23, 2014 at 14:27

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