名詞 icebreaker:

1. a ship with a reinforced bow to break up ice and keep channels open for navigation
   同義詞：iceboat
2. a beginning that relaxes a tense or formal atmosphere

ice.break.er

n.（名詞）
Nautical A sturdy ship built for breaking a passage through icebound waters.Also called iceboat
【航?！?/i> 破冰船：用來(lái)在冰封的水中開(kāi)道的一種堅(jiān)固的船也作 iceboat
A protective pier or dock apron used as a buffer against floating ice.
橋墩護(hù)檻：保護(hù)橋槨免受浮冰碰撞的護(hù)欄或碼頭圍欄

Something done or said to relax an unduly formal atmosphere or situation.
緩和緊張氣氛者：緩和特別正式的氣氛或情況所說(shuō)的話(huà)或做的事情
A beginning; a start.
開(kāi)始；開(kāi)端

【引伸】
ice.break.ing
n.（名詞）