ˈīsˌbərg, -bə̄g, -bəig noun
Etymology: probably part translation of Danish or Norwegian isberg, from is ice + berg mountain, from Old Norse, rock — more at barrow
1.
a. archaic : glacier
b. : a large mass of land ice broken from a glacier at the edge of a body of water that when afloat has only a small part above the surface and that in the ocean floats with subsurface currents often to great distances — called also berg ; compare growler , ice island
2. : an emotionally cold person
3. : something of which only a fraction is observed or explicit
the seven-eighths of the iceberg of personality that is submerged and never seen — W.E.Allen