BLUF: (Bottom Line Up Front) The plural of basis is bases. basis: the bottom of something considered as its foundation: something on which something else ….
You can build a structure around a center, but bases go on the bottom of things, so you can’t base something around something else. Ask ….
When you offer to trade something tangible in payment for something else, say your Levi’s jeans for a handwoven shirt in Mexico, or a week ….
Whether you are bailing out a rowboat or a bank, use the two-word spelling to describe the action of doing it (the verb form): “we ….