Simple past tense and past participle of blotch.(verb)
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Use "blotched" in a sentence
"He rounded a slight bend in the road, which then turned to gravel intermittently blotched with mud."
"Her hands shook, and her face was blotched and swollen from weeping."
"And the immersive nastiness of their aesthetic — decayed bathrooms, foul workshops, seeping industrial spaces, blades blotched with rust — distilled the slasher-flick elixir: atmosphere."