1. in a manner involving both land and water operations
Usage: military
2. in a way that functions or operates in two different environments or conditions

Examples

• The marines attacked amphibiously, launching from ships and advancing onto the beach.
• The military force operated amphibiously during the coastal invasion.
• The vehicle was designed to move amphibiously across both terrain and water.
• The rescue team worked amphibiously to reach victims on both land and sea.
• The expedition proceeded amphibiously through the wetlands.
• Forces deployed amphibiously to secure the island.