The word ‘tsunami’ can be 13 ______ from Japanese as ‘big wave’. It describes a 14 ______ process that can be dangerous for people and their homes. Most of the huge waves appear after earthquakes. Most waves are 15 ______ in the Indian and the Pacific Oceans where volcanoes are active. The mass of water 16 ______ from the bottom of the ocean and moves to the shore. It moves at the speed of a plane and can be up to 40 meters high. The wave is very 17 ______ and dangerous. In 2004, a tsunami happened in the Indian Ocean. It was one of most terrible natural disasters in history. It 18 ______ 14 countries bordering the Indian Ocean. Thousands of people were killed or went missing.