blindingly

An action or situation can be blindingly obvious, meaning it's extremely clear and not hard to understand at all.

When we say something is blindingly obvious, we mean that it's so obvious that anyone with normal vision could see what's going on. It's not hidden in any way. For example, if you trip over a big rock on the sidewalk, it might be blindingly obvious why you fell down – the rock was right there! In everyday conversation, people often use this phrase to point out how something is ridiculously clear or apparent. Like if someone says, "It's blindingly obvious that the movie is based on a true story because of all the real-life events it includes," they're saying that anyone with common sense can see the connection.