Wiktionary
desertify
vb. 1 (context intransitive of a geographical region English) to become desert 2 (context transitive English) to cause (a geographical region) to become desert
Usage examples of "desertify".
In this regard, however, it was no worse than many desertified parts of Earth itself and was more accommodating than others.
Where Bonadan was a desertified wasteland, Bakura was still verdant and pastoral, on the other end of the spectrum of environmental degradation.