iceberg

iceberg
/ˈaɪsbɜ:g; `aɪsˌbəɡ/ n
1 huge mass of ice floating in the sea 冰山（海上飘浮的巨大冰块）. =>illus 见插图.
2 (fig 比喻) unemotional person 冷若冰霜的人.
3 (idm 习语) the tip of the iceberg => tip1.

牛津英汉双解词典