You could theoretically have things like a totally frozen lake or a river of blood though.
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I'm also concerned about images where water is not the focus, such as post #738990 under river.
We could keep them separate for the reason that lake refers to a lake with water, while a frozen lake refers to a lake that is frozen over.
bloody tears isn't implicating tears, so we can use the same for frozen lake not implicating lake
Updated