に違いない (日本語能力試験 N3)

「に違いない」の情報

When the case marking particle に is combined with the noun 違(ちが)い 'difference', and the い-Adjective ない, an expression similar to 'there is no doubt that (A)', or 'I'm sure that (A)' is created.
に違(ちが)いない may be used with any verbs, い-Adjectives, な-Adjectives or nouns in their plain form.

彼(かれ)らは、先生(せんせい)がいなくなったらふざけるに違(ちが)いない。
There is no doubt that they will muck around once the teacher has gone.
あなたが美味(おい)しいというなら、美味(おい)しいに違(ちが)いない。
If you say that it is good, I have no doubt that it is.
タナカ君(くん)は全然(ぜんぜん)料理(りょうり)を食(た)べてない。この料理(りょうり)が嫌(きら)いに違(ちが)いない。
Takana-kun is not eating his food at all. There is no doubt that he does not like it.
今(いま)のピンポンは近所(きんじょ)の子供(こども)のいたずらに違(ちが)いない。
There's no doubt that the doorbell I just heard must have been a prank by the neighbor's kid.

Fun Fact

As に is marking the preceding word in this expression as an existing location (or state), 違(ちが)いない is stating that no 'variance' exists within that state. This means that the literal translation of に違(ちが)いない is close to 'there is no discrepancy in (A)'.

あの人(ひと)はカメラマンに囲(かこ)まれている、有名人(ゆうめいじん)に違(ちが)いない。
That person is surrounded by cameramen. There is no discrepancy in that person being famous. (No reason to disbelieve)

Caution

It should be noted that 違(ちが)いない is a combination of a noun and an い-Adjective, and not the negative form of the う - Verb 違(ちが)う, which would be 違(ちが)わない. 違(ちが)いない translates as 'there is no difference', while 違(ちが)わない would translate as 'it is not different'.

同義語

例文

彼女(かのじょ)は病気(びょうき)に違(ちが)いない。
There is no doubt that she is sick.
現場(げんば)で彼(かれ)の髪(かみ)の毛(け)が見(み)つかったので、彼(かれ)は犯人(はんにん)に違(ちが)いない。
His hair was found at the scene. There is no doubt that he is the offender.
あんな転(ころ)び方(かた)をして、痛(いた)いに違(ちが)いない。
Falling in that way, there is no doubt that it hurts.
何回(なんかい)呼(よ)び鈴(りん)を押(お)しても出(で)てこない。きっと寝(ね)ているに違(ちが)いない。
No matter how many times I ring the bell, they won't come out. I am sure they are sleeping.
あの言(い)い方(かた)だと、何(なに)か隠(かく)しているに違(ちが)いない。
From the way he speaks, there is no doubt that he is hiding something.
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