[ansel12]

How about that “frost” stuff in a can for Christmas? You might still be able to find some on sale - I wonder if that would frost the windows enough to prevent seeing through, but still let some sunlight in. Kind of like the frosted glass in my bathroom window?

I've used it and it works fine, but if a curtain or hands are bumping the window a lot, then it wears off, it is excellent for someone who wants to try the idea first.

[heartwood]

Frosted plastic window film. I’ve used it in downstairs bathrooms, front door windows. Looks good, like frosted glass, if you trim it neatly with a razor knife