periscope
UK/'periskәup/US
IELTSGREC2
Definitions
n.
An optical instrument, typically a tube with mirrors or prisms, for viewing over or around an obstacle from a concealed position, as in a submarine.
潜望镜（通常是带镜子或棱镜的管状光学仪器，用于从隐蔽位置越过或绕过障碍物观察，如潜艇上所用）。
Root Breakdown
Root-derivedperi- (around) + scope (look) = an instrument for looking around or over something in the way. Mirrors bend the light path so a hidden observer below can see what is happening above or beyond an obstacle.
Root scope still carries 4 more wordsCommon Collocations
- 1.raise the periscope升起潜望镜
- 2.submarine periscope潜艇潜望镜
- 3.look through a periscope通过潜望镜观察
- 4.lower the periscope放下潜望镜
Example Sentences
- 1.
The submarine raised its periscope to scan the surface for ships.
- 2.
Through the periscope, the captain watched the convoy without being seen.
- 3.
Soldiers in the trench used a periscope to look over the parapet safely.