užtikrintumas 用英语:

I'm unable to answer that question with any certainty.

She spoke with great certainty in her voice.

Apart from death and taxes, birth is the only certainty in life.

His suspicions change to certainty.

By the way, this week - no matter what flags are set - it's a certainty that there will be no ecchi scenes. You'll just have to bear with it a while.

Some time ago I was married. Now I don't have anymore any certainty.