MrsKen33
So is it ‘They sat at a discrete distance’ and ‘ He told her his problem as he knew she would be discreet.’ ?
Have I got it right ?
You wouldn't say a discrete distance. Discrete has the meaning of being individual, unjoined, distinctive or unique, it is not about the physical distance from something or someone else, but about individuality.
Discreet is about being careful of what you do or say, for instance about facts or news that are not for everyone's ears, or which you have been told in confidence. Or, in your example, they could be sitting at a discrEEt distance, presumably so that there would be no wrong assumptions made about the relationship, but not a discrete distance.