Frangible means brittle or liable to break. To me it sounds like one of those flaky pastry things which shatter as you bite into them, but not until after they’ve squidged a dollop of cream down whatever you were wearing.
It could also apply to that little burst of confidence that allows us to submit our work and which cracks at the mere thought of a ‘thanks but no thanks’ by return of post. Still if you want to be published you have to risk that.Stained glass is frangible. This example is hundreds of years old. It’s lasted because it’s surrounded and supported by the stone walls of Dover castle. Maybe there’s a lesson there?