undersea

Everyday

Undersea means below the surface of the sea or happening under the sea. tree →

In the lessons

In science lessons it describes the world beneath the waves: undersea mountains, volcanoes, cables, caves and creatures. In stories, explorers in submarines visit undersea cities. Phrases: «undersea world», «undersea cable», «undersea volcano», «undersea tunnel».

Examples

• Divers explored the undersea caves. tree →
• An undersea cable carries internet signals across the ocean. tree →
• Some islands are the tops of undersea volcanoes. tree →
• The film showed the colourful undersea world of a coral reef. tree →
• A train goes through an undersea tunnel. tree →
• The mermaid lived in an undersea palace. tree →

Note

Adjective, one word, usually before a noun: «undersea creatures». Similar: «underwater» (under any water), «submarine» (adjective meaning under the sea). Not «under sea» as two words in this use.