Untrustworthy

Don't have anything to do with him. He is completely untrustworthy.

Frankly speaking, he is untrustworthy.

You can believe him. He's not an untrustworthy person.

Tom is untrustworthy.

You're untrustworthy.

We thought you were untrustworthy.

Do you think Tom is untrustworthy?

I think Tom is untrustworthy.

Tom was untrustworthy.

Tom is very untrustworthy.

While a corrupt Chuch and untrustworthy nobles and kings scraped for power, businessmen in Italy honored pledges of businessmen from England and Scandinavia. This trust (some have called it honor among thieves) is still a hallmark of modern brokerage.