It's a bit tricky to see the connection at first glance, but let's break it down:
* Forascan originally meant "to ask for, to demand, to require."
* This meaning evolved to "to oppose" because asking for something could be seen as challenging or opposing the current state of affairs.
* "Ask" comes from the Old English word "ascian", which is a direct descendant of "forascan".
So, although the modern meaning of "ask" is quite different, the root of both words is the same, and the evolution of meaning from "requesting" to "opposing" gives us a glimpse into the flexible nature of language.