Sentence:  Who were these Teutons? Rome knew them only vaguely as wild tribes dwelling in the gloom of the great forest wilderness. In reality they were but the vanguard of vast races of human beings who through ages had been slowly populating all Eastern Europe and Northern Asia. Beyond the Teutons were other <WSD>Aryans</WSD>, the Slavs. Beyond these were vague non-<WSD>Aryan</WSD> races like the Huns. ...<!-- are these durable? 
Meaning of the word marked with <WSD> tags:  Of or pertaining to Indo-European peoples, cultures and languages.