〜に相違ない
Formation
N2SuppositionFormal/Stiff
Meaning
Used to express a strong conviction or certainty that something is true. It is a more formal and written version of 'に違いない'.
Note
A very stiff and formal expression, often used in written reports, news, or formal speeches. Implies that there is no room for doubt ('no difference').
Examples
犯人は窓から逃げたに相違ない。
The culprit must have escaped through the window.
彼は真実を話しているに相違ない。
He must be telling the truth.
そのニュースを聞けば、彼女も喜ぶに相違ない。
She will surely be happy to hear that news.
今回の試験はかなり難しいに相違ない。
This exam must be quite difficult.
この計画は完璧に相違ない。
This plan must be perfect.
彼女なら、その仕事に最適に相違ない。
She must be the best person for that job.
これは彼が書いた手紙に相違ない。
This must be the letter he wrote.
あの声は田中さんに相違ありません。
That voice must be Tanaka-san's.