身體上的毛病
可以理解成從診間來的：病人上門，說出來的就是「哪裡不舒服」，那份不舒服本身於是也被叫做 complaint——內容從「對服務的不滿」換成了「對身體的不適」。
minor illness · noun · B1
An illness or health problem, especially one that is not very serious.
病痛 / 毛病
核心畫面
Someone speaks up: this is not right, and I want you to know. A complaint is that act of putting into words and handing it to someone. From the act, the word slides to the content (what exactly is wrong), and then — in careful, formal English — to the thing a patient reports to a doctor.
可以想成：有人開口了——「這樣不對，我要讓你知道」。complaint 就是把不滿說出口、遞出去的那個動作。從這個畫…更多收起
可以想成：有人開口了——「這樣不對，我要讓你知道」。complaint 就是把不滿說出口、遞出去的那個動作。從這個畫面出發，字義會滑動：先從「這個動作」滑到「內容」（到底哪裡不對），再滑到醫生那一頭——病人來看診時說的「哪裡不舒服」，在正式的用法裡也叫 complaint。From the picture
Also in this word
expression of dissatisfaction · noun · B1
A spoken or written statement saying that you are not happy about something and think it is wrong or bad.
抱怨 / 投訴
specific grievance · noun · B1
The particular thing or reason that you are not happy about.
不滿之處 / 意見
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。
complaintnoun/kəmˈpleɪnt/
- 1
The act of complaining.
- customer complaints
- noise complaints
- 2
A grievance, problem, difficulty, or concern.
- I have no complaints about the quality of his work, but I don't enjoy his company.
- 3
lawIn a civil action, the first pleading of the plaintiff setting out the facts on which the claim is based.
- 4
lawIn criminal law, the preliminary charge or accusation made by one person against another to the appropriate court or officer, usually a magistrate.
- 5
A bodily disorder or disease; the symptom of such a disorder.
- Don't come too close; I've got this nasty complaint.
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。