The strange, the bizarre and the unexpected

[BoggleOtaku]

I found as obsolete spelling of deraign; maybe this definition was unintendedly left out of lexic.

[Nylimb]

Thanks, BoggleOtaku. That sounds plausible. The Oxford English Dictionary lists that meaning, and also an obsolete use from the 1500s where it meant "To rain down, fall as rain.": https://www.oed.com/search/dictionary/?q=derain