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When he came back from the field, his boots were caked with mud.

Is it correct to paraphrase the underlined part as "his boots were covered with lumps of mud?"
Thanks.
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That's the idea, but an inaccurate way of expressing it: muddy boots do not consist of distinct lumps, but of a single, thick, hard (caked) layer of the stuff.
Comments  
Mister MicawberThat's the idea, but an inaccurate way of expressing it: muddy boots do not consist of distinct lumps, but of a single, thick, hard (caked) layer of the stuff.

Thanks, Mister.

Now I know why "were caked with mud" is used.