icebreaker

名词 icebreaker:

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

ice.break.er

n.（名词）
Nautical A sturdy ship built for breaking a passage through icebound waters.Also called iceboat
【航海】 破冰船：用来在冰封的水中开道的一种坚固的船也作 iceboat
A protective pier or dock apron used as a buffer against floating ice.
桥墩护槛：保护桥椁免受浮冰碰撞的护栏或码头围栏

Something done or said to relax an unduly formal atmosphere or situation.
缓和紧张气氛者：缓和特别正式的气氛或情况所说的话或做的事情
A beginning; a start.
开始；开端

【引伸】
ice.break.ing
n.（名词）