Since the the introduction of the arabic word /"anbar/ in the 11th century in European Languages, (fr. ambre; eng. amber from lat. ambra), this word has been used to define two quite different substances: some sort of stone and a perfume. Contemporary lexicographers believe that ancient authors have recognized these two substances as the same and this identification has led to a semantic confusion. These lexicographers, however, have not throughly explained how this terminological confusion has taken place. The source of this confusion has been seemingly justifiable since the mode of extraction of these two natural substances from the sea is the same and so it would be evident that this confusion must have occured. This supposition is not based on medieval documents. The study of the historical documents shows that the designation of these two substances by the same word is problematic. Europeans who have extracted the amber from the Baltic Sea and well knew this substance have naturally assigned local terms to what is known later as amber. On the other hand, the main part of medieval knowlege on amber in the West comes from the oriental sources in Arabic language which the European scholars have exploited and translated in Latin (known as lapidaires in french). In the meanwhile, these main oriental sources have always distinguished the amber ("fossil resin", named kahroba) from the amber as a perfume (named "anbar). So this unexplained confusion apprears somewhere in the West during this period despite the clarity of the classical latin sources (Tacitus, Cassiodorus) as well as the Arabic literature on the subject.

In the Holy Quran, “Khatiah” is one of the concepts of the wide semantic field of sin, which is linked to several concepts. For adding this concept in the Holy Quran, it is necessary to study its semantic core in ETIMOLOGY. The present study aims at recognition of semantic elements of the concept by considering the meaning of "Khatiah" in Semitic languages and its biologists comment and relation by aims Imagination Semantic components “Khatiah”. in the Holy Quran. Data of ETIMOLOGY shows that usage of concept “Khatiah” in Sin, Neglect, diversion and get out. With care in Spotify Subscription and the proximity of sounds in two terms “hete” and “khata” shows the usage of these two words in the Ebric languages. Examining the Concepts of ergonomics shows that existence of concepts Heavyweight mastering, wastefulness and  Out of moderation. The concept of text shows God Almighty operates two models, which include to forgive and to punish. Humans behave three models that include to prform of “Khatiah”, Prayer for the end of torment and asking for forgiveness.

In the veterinary texts of the Islamic period, we frequently encounter the word Qeysar, which is an animal disease and specially has been well described in horses. It is characterized by muscular contractions, the retraction of the third eyelid, dysphasia and other symptoms that have been mentioned in the veterinary literature of Islamic period manuscripts. Considering these symptoms and some evident similarities, we have tried in this study to compare Qeysar with Tetanus. Our methods are etymological and historical studies of these three words (Qeysar, Kozaz and Tetanus), in classical Arabic, Persian and also western (Roman and Greek) sources. According our knowledge, this is the first scientific study of Qeysar in the view point of pathology and ETIMOLOGY of this disease.