what does it mean?

He has always behaved in a trustworthy manner.

I don't think it necessarily means that he has behaved in a trustworth manner, it just means that nobody has been suspicious of his behavior...perhaps for other reasons, such as not stature/rank, or not having a motive.

I agree, but I didn't mean to imply that trustworthy had no relative nuances either. I just didn't want to use conduct or suspicion in the definition in case these were part of the confusion. What would be a good definition using equivalent terms?

Doesn't "above suspicion" mean something more than "not suspicious"? I would say it suggests his behaviour has always indicated a level of morality which causes observers to assume he is honest and moral.

cheers

cyberman