Definition
to have trust and confidence in someone.
信任某人
Despite his mistakes, I am still sure of his capabilities.
尽管他犯了错误，我仍然对他的能力有信心。
You can always be sure about her in complex situations.
在复杂的情况下，你总是可以相信她。
We need a reliable teammate, so I am sure of his ability to deliver.
我们需要一个可靠的队友，所以我对他的交付能力很有信心。