Simple past tense and past participle of desolate.(verb)
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Use "desolated" in a sentence
"China tested its nuclear in desolated region in Xinjiang and France did the same in a no man island."
"In such a universal scramble, the Earth will be just plain desolated, because everyone will be striving merely to survive ... regardless of the cost to the environment."
"Saxons had already made of Canterbury and Anderida, a 'Waste Chester,' that is, a desolated stronghold."