Learn Farsi: این که تبخیر افزایش می‌یابد به بیابان‌زایی ختم می‌شود. - The fact that evaporation increases ends in desertification.

Khatm shodan literally means 'to be concluded' or 'to finish.' When paired with the preposition be (to/in), it means 'to end in' or 'to result in.' As taught in this lesson, it connects a cause to its consequence. Here, it is followed directly by the noun biaban-zayi (desertification).

Why does the sentence start with 'in ke' instead of just 'ke'?

In ke literally translates to 'this that,' but it acts as 'the fact that' in English. You need in ke here because the entire clause tabkhir afzayesh mi-yabad (evaporation increases) is acting as the subject of the main verb khatm mi-shavad. A simple ke cannot act as a subject pronoun on its own at the beginning of a sentence.

What is the subject of the main verb 'khatm mi-shavad'?

The subject is the entire noun clause: in ke tabkhir afzayesh mi-yabad (the fact that evaporation increases). When a whole clause acts as the subject, the main verb always takes the third-person singular form, which is why we use mi-shavad.

How is the word 'biaban-zayi' (desertification) formed?

It is a compound noun made of biaban (desert) and the suffix -zayi, which comes from the verb zaidan (to give birth / to generate). In advanced vocabulary, -zayi is often used to describe a process of generating or creating something, so biaban-zayi literally means 'desert-generating.'