Replace the underlined words using an appropriate form of the word in brackets.

1. The irrational dislike of people of other ethnic groups is one of the root causes of conflict. (hate)
2. The involvement of the United Nations in the situation helped to restore peace. (intervene)
3. The political groups that opposed one another finally negotiated a peace agreement. (rival)
4. The general was a cruel and violent dictator who ruled for 18 years. (Brute)
5. There had been a longstanding feeling of not trusting each other between the two tribes. (trust)
6. The fight against the government began in 2010. (reBel)