Simple Stemming Rules for Arabic Language Hussein Soori, Jan Platos, Vaclav Snasel Abstract Processing of Arabic language is very improtant and actual these days. The arabic is the sixth most used language in the word. The problem of stemming is very important in information retrival, knowledge mining lan- guage processing. The Arabic has very complex morhology and the stemming rules must deal with lot if specific properties of Arabic. This paper describes five very simple rules for stemming of arabic vords, two rules are universal, i.e. applicable on any word type, and one rule for adverbs and adjectives, one rule for nouns and one rule for verbs. 1 Introduction The importance of conducting research in the area of Arabic language pro- cessing is called for two main reasons: the rapidly growing number of com- puter and internet users in the Arab world and the fact that the Arabic language is the sixth most used language in the world today. It is also one of the six languages used in the United Nations (www.un.org). Another im- portant factor is, after the Latin alphabet (Latin alphabet), Arabic alphabet is the second-most widely used alphabet around the world. Arabic script has been used and adapted to such diverse languages as the Slavic tongues (also known as Slavic languages), Spanish, Persian, Urdu, Turkish, Hebrew, Amazigh (Berber), Swahili, Malay (Jawi in Malaysi and Indonesia), Hausa, and Mandinka (in West Africa), Swahili (in East Africa), Sudanese, and some other languages [1]. Department of Computer Science, FEECS VSB-Technical University of Ostrava 17. listopadu 15, 708 00, Ostrava Poruba, Czech Republic {sen.soori, jan.platos, vaclav.snasel}@vsb.cz 1