desertify
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desertify
(dɪˈzɜːtɪˌfaɪ)vb, -fies, -fying or -fied
to (cause to) become a desert
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Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005