核心畫面
Adding something to a thing that already exists so it can take pressure it could not take before — thicker walls, more muscle, an extra support — and what used to bend or break now holds.
可以想成在一個已經存在的東西上再加點什麼，讓它撐得住原本撐不住的力道：牆裡多埋一層鋼筋、身體多練幾塊肌肉。同樣的壓力…更多收起
可以想成在一個已經存在的東西上再加點什麼，讓它撐得住原本撐不住的力道：牆裡多埋一層鋼筋、身體多練幾塊肌肉。同樣的壓力再壓下來，它不再彎、不再垮。strengthen 幾乎都是這個動作的延伸——不是從無到有做出東西，而是把本來就有的東西加到更耐得住、更有分量。原始詞典資料6 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。
strengthenverb/ˈstɹɛŋ(k)θən/
- 1
To make strong or stronger; to add strength to; to increase the strength of; to fortify.
- strengthen a muscle
- strengthen a wall
- 2
To empower; to give moral strength to; to encourage; to enhearten.
- Charge Joshua, and encourage him, and strengthen him.
- my father and mother strengthened me in this my first impression, saying in my presence, I was intended for some great purpose
- 3
To augment; to improve; to intensify.
- 4
To reinforce, to add to, to support (someone or something)
- strengthen an army
- Each half-section of the battery weighs about eight tons, and the two underframes had to be strengthened to take this weight.
- 5
To substantiate; to corroborate (a belief, argument, etc.)
- strengthen the cause
- 6
To grow strong or stronger.
- my affection seems so superfluous that I often wonder why it should be so strong. But wise or foolish, there it is, strengthening with the years whether I will or no
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。