Sentence:  "One of the main ideas used to interpret and generally devalue the ancient history of India is the theory of the <WSD>Aryan</WSD> invasion. According to this account, India was invaded and conquered by nomadic light-skinned Indo-European tribes from Central Asia around 1500-100 BC, who overthrew an earlier and more advanced dark-skinned Dravidian civilization from which they took most of what later became Hindu culture. This so-called pre-<WSD>Aryan</WSD> civilization is said to be evidenced by the large urban ruins of what has been called the "Indus valley culture" (as most of its initial sites were on the Indus river). The war between the powers of light and darkness, a prevalent idea in ancient <WSD>Aryan</WSD> Vedic scriptures, was thus interpreted to refer to this war between light and dark skinned peoples. The <WSD>Aryan</WSD> invasion theory thus turned the "Vedas", the original scriptures of ancient India and the Indo-Aryans, into little more than primitive poems of uncivilized plunderers." [http://www.hindunet.org/hindu_history/ancient/aryan/aryan_frawley.html] --> 
Meaning of the word marked with <WSD> tags:  Of or pertaining to Indo-European peoples, cultures and languages.