違いない

ちがいない

sure; no mistaking it; for certain; without doubt

JLPT N3 common word Also written 違い無い

Meaning

expadj-i
sure; no mistaking it; for certain; without doubt

Example sentences

私もそうだが、ＩＴ業界には宵っ張りの人が多いに違いない。

I'm one too, and I'm sure there are lots of night-owls in the IT world.
まさかオレがごねずにすっきり起きると思っていなかったに違いない。

Certainly she wouldn't have dreamt that I would get up promptly without grumbling.
路上の血痕は俺のものに違いない。

The blood on the road must be mine.