ETYM Greek amphibios living a double life, i.e., both on land in water; amfi + bios life.
1. Operating or living on land and in water.
2. Relating to military forces prepared for operations launched from the sea against an enemy shore.
3. Relating to or characteristic of animals of the class Amphibia; SYN. amphibian.
fig. Dvojak, prevrtljiv.