Causality in the meanings of the prepositions in Arabic and Persian languages

In this paper the researchers study the Causality sense as the one of the most important meanings between Arabic and Persian prepositions according to the grammar of Arabic and Persian languages and studies of the grammarians and lexicographers of two languages. As the consequence investigate the Arabic and Persian prepositions that are used in this sense by applying the method of comparative and analyzing. The most important result of this research is that the Arabic and Persian prepositions in expressing a special meaning do not always have a one to one relationship. In a way that sometimes one preposition in one language is used instead of two or more prepositions in another language or even instead of the other grammatical elements. The importance of this issue is when one is translating from one language to another. In addition, it is advantageous for the researchers and linguists and especially students.