當底子：先把地整平
這一支取的是地面「當底」的角色。房子要蓋，先要有一塊鋪平的地；學問要長，也要先有一層最基本的東西撐著。
noun · B2
The basic training or knowledge in a subject or a skill that you get at the start, and that everything you learn later is built on top of.
基礎訓練
核心畫面
One way to hold this word: every use of grounding points at the ground — the floor under your feet, the sea floor under a boat, the earth a wire runs down to. The ground does two jobs in these pictures. It is the flat thing you build on, so what you put there stands up and can be added to. It is also the thing that holds something in place, so what is on it cannot fly off or slip away. The training sense is the first job: level the base, then build. The stopped plane, the child kept at home, the ship stuck on the bottom are the second job: the ground has them. And a person's grounding is the quiet version of both — feet really on the floor, so the wind does not move you.
grounding 的各種意思，可以想成都長在「地面」這個畫面上。腳底下的地、船底下的地、電流最後回去的大地。地面在…更多收起
grounding 的各種意思，可以想成都長在「地面」這個畫面上。腳底下的地、船底下的地、電流最後回去的大地。地面在這些畫面裡做兩件事。一件是當底：先鋪平，東西才蓋得上去。另一件是留住：踩在地上的東西飛不走、也跑不掉。學科的 grounding 是前一件——地基打好，後面學的才有東西可以疊。飛機停飛、小孩禁足、船擱淺是後一件——被地面留住了。人的踏實感則像是兩件事合起來：腳確實踩得到地，所以風再大也站得住。From the word’s history
Wiktionary's surface analysis of the word is simply ground + -ing — the -ing noun of ground. That is why every branch still reads as something happening at, on, or down to the ground.
Wiktionary 對這個字的拆解就是 ground 加 -ing，也就是 ground 的 -ing 名詞。這條線索解釋了為什麼每一個分支讀起來，都還是「在地上、碰到地、通到地」的事情。
Wiktionary (kaikki extract in this packet, source_ref kaikki:3f6f69a190036ae4:1370781505; etymology_text: "By surface analysis, ground + -ing.")
Three branches
被地面留住：不准動
這一支取的是地面「留住」的角色。東西一旦貼著地，就飛不起來也走不掉——差別只在是誰或什麼把它按在那裡。
noun · B2
An official order that stops an aircraft from flying — one plane, or every plane of one type — and the time that order lasts, usually because flying would not be safe.
停飛
接上地面，才穩、才安全
這一支取的是「和地面連著」的狀態。連著地不是為了不動，而是為了在出狀況時有地方去、有東西撐。
noun · B2
The safety connection that joins the metal body of a machine, or the wiring of a building, to the earth, so that electricity has a safe path out if something goes wrong.
接地
原始詞典資料9 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。
groundingnoun/ˈɡɹaʊndɪŋ/
- 1
Fundamental knowledge or background in a field or discipline.
- The readers to whom the book is principally addressed, B.R. drivers and trainee drivers, have at last been provided with a clearly written and exceptionally well-illustrated handbook of diesel locomotive practice, combining a grounding in the basic principles of the internal combustion engine with a clear exposition of electrical machines and circuitry such as is not found in most textbooks.
- 2
The return to a fully conscious state after a psychedelic experience.
- 3
The collision of a ship with ground beneath the surface of the water.
- 4
The prevention of aircraft takeoff because of government action.
- 5
businesselectricalelectrical-engineeringThe interconnecting metal chassis or frame of a device, appliance, machine, or metal raceway via a designated conductor to earth at the service panel. It may be bare or covered, and does not carry current in normal operation.
- 6
The absorption of energy through visualized roots descending from oneself into the ground, using chi.
- 7
The act by which a child is grounded (forbidden from going out, using electronics, etc.).
- 8
The background of embroidery, etc.
這個拼法也被記錄為下列字的變化形：
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。