核心畫面
You can picture underneath as the space that is hidden by whatever sits on top of it: the cat under the sofa, the floor under the carpet. Something covers it, so you have to lift, bend down, or turn the thing over to reach it. Everything else the word does grows out of that one arrangement — a layer on top, and a layer below that you do not see straight away.
可以想成一個「被壓在上面那層底下」的位置：沙發下的貓、地毯下的地板。上面有東西蓋著，所以你得彎下腰、掀起來、或把東西…更多收起
可以想成一個「被壓在上面那層底下」的位置：沙發下的貓、地毯下的地板。上面有東西蓋著，所以你得彎下腰、掀起來、或把東西翻過來才看得到。這個字的其他用法，幾乎都是從這個「上面一層、下面一層，而下面那層一眼看不見」的畫面長出來的。原始詞典資料7 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
underneathadv/ˌʌndəˈniːθ/
- 1
Below; in a place beneath.
- I can't take my sweater off: I amn't wearing anything else on underneath.
- connected with it underneath, you see a very fine hair-spring.
- 2
On the underside or lower face.
- No insects exhibit, like them, what may be termed four net-work eyes. It is very easy to perceive them in looking at the animal from above, and then examining it underneath
underneathprep/ˌʌndəˈniːθ/
- 1
Under, below, beneath.
- Underneath the water, all was calm.
- We flew underneath the bridge.
- 2
Under the control or power of.
- There was little freedom underneath the Nazi jackboot.
underneathadj/ˌʌndəˈniːθ/
- 1
Under, lower.
- You can have the underneath bunk.
- The mess in the kitchen was one thing. The way the place smelled was another—some sort of chemistry-lab stink on top, some other smell underneath it. He was afraid the underneath smell might be blood.
underneathnoun/ˌʌndəˈniːθ/
- 1
The bottom of something.
- The underneath of the aircraft was painted blue.
- Nawnim yelped, heaved away, struck his head on the underneath of the bed, and rolled into view bawling.
- 2
A background radio sound track played during a specific announcement or program.
- The underneath is music from the latest album by ….
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。