讓對方知道你看到了
最具體的一面：用動作或一句話表示「收到、看到」。
acknowledge, greet, wave · verb · B1
to show someone that you have seen them, for example by waving, smiling, or nodding.
示意；表示看到對方
核心畫面
Picture catching someone's eye across a room and giving a small nod. Nothing has been agreed and nothing has been praised — you have simply let them know that you see them. Every other use is that nod pointed at something else: at a fact you would rather not see, at someone's ability, at their authority, at help they gave you, or at a parcel that arrived.
可以想成：在房間另一頭跟某人對上眼，你輕輕點了個頭。沒有答應什麼，也沒有稱讚什麼，你只是讓對方知道「我看到你了」。其…更多收起
可以想成：在房間另一頭跟某人對上眼，你輕輕點了個頭。沒有答應什麼，也沒有稱讚什麼，你只是讓對方知道「我看到你了」。其他每一個用法，都是把這個點頭指向別的東西：指向一個你不太想面對的事實、指向某人的實力、指向他的權威、指向他幫過你的忙，或指向一個寄到的包裹。Three branches
承認某件事確實存在
點頭的對象換成一個事實：即使不情願，也表示「我看見它在那裡」。
acknowledge, admit true · verb · B2
to say that something is true, or that a problem is real, even when you would rather not say it.
承認
公開肯定一個人
點頭的對象變成人的價值、地位或付出：都是在人前把它說出來。
acknowledge, recognize as good · verb · C1
to accept and say openly that someone or something is very good or important.
公認；肯定
原始詞典資料5 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。
acknowledgeverb/əkˈnɒl.ɪd͡ʒ/
- 1
To admit the knowledge of; to recognize as a fact or truth; to declare one's belief in.
- to acknowledge the being of a god
- I acknowledge my transgressions.
- 2
To own or recognize in a particular quality, character or relationship; to admit the claims or authority of; to give recognition to.
- By my soul, I'll ne'er acknowledge thee.
- In all thy ways acknowledge Him.
- 3
To be grateful of (e.g. a benefit or a favour)
- to acknowledge a favor
- They his gifts acknowledged none.
- 4
To report (the receipt of a message to its sender).
- This is to acknowledge your kind invitation to participate in the upcoming debate.
- 5
To own as genuine or valid; to assent to (a legal instrument) to give it validity; to avow or admit in legal form.
- One who has been sheriff may acknowledge a deed executed by him while in office.
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。