If I had just read a little more in my aggregator before posting that last item on trust, I would have come across Luke Naismith's The A-Frame of Trust in which he describes trust as an alliterative A-Frame house:
But how do we build trust? What are its elements? Trust is like building a house, or more precisely, an A-frame house. In the interests of alliteration (it’s easier sometimes to remember things that way), and along with a fellow co-designer (Ann whose name just happens to start with “A” as well!), we came up with the five items that make up the A-frame of Trust.
The arrangement of the five items in the A-Frame is intended. Apology is the bridging device, Adventure and Accountability are the key supports, and agreement and authenticity help balance each other.
[I've snipped Luke's picture and his explanations of each element.]
In his intro, Luke talks about the idea of trust being cyclical. There is a history that develops and builds (or destroys) trust for the moment (adventure). And there is also an assumption that the trusting parties are going to interact in the future, so there is the need for things like "apology" and "agreement."