核心畫面
You can picture ninth as what happens when you turn the count nine into a position: the ninth thing sits at slot nine in a line, and a ninth is one slot when a whole is cut into nine equal shares.
可以想成，ninth 是把「九」從「有幾個」轉成「第幾個」。排隊排到第九個位置、名單上的第九行——講的都是位置，不是…更多收起
可以想成，ninth 是把「九」從「有幾個」轉成「第幾個」。排隊排到第九個位置、名單上的第九行——講的都是位置，不是數量。而同一個轉換用在切東西上，就變成把一個整體切成九等份、拿其中一份，也就是九分之一。這兩個用法其實是同一件事的兩面：都在講「九格裡的那一格」。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。
ninthadj/naɪnθ/
- 1
The ordinal form of the number nine.
- Ever since El Martinez started asking to be called by the gender-neutral pronouns “they/them” in the ninth grade, they have fielded skepticism in a variety of forms and from a multitude of sources about what it means to identify as nonbinary.
- Kash Patel, born to Gujarati parents in New York in 1980, was sworn in as the ninth director of the Federal Bureau of Investigation on Friday, in the presence of his girlfriend Alexis Wilkins and his family.
ninthnoun/naɪnθ/
- 1
The person or thing in the ninth position.
- 2
One of nine equal parts of a whole.
- 3
entertainmentlifestylemusicThe compound interval between any tone and the tone represented on the ninth degree of the staff above it, as between one of the scale and two of the octave above; the octave of the second, consisting of 13 or 14 semitones (called minor and major ninth).
ninthverb/naɪnθ/
- 1
To lose a ninth.
- οὐ[δ̓] ὲνατεὐεται, should be translated “a tithe (offering or fee) is not given (or paid)”, “no tithing” (literally, “a ninth is not given”, “no ninth-ing”, if I may coin such a word).
- A yearling "is ninthed" for Semele on Myconos (LSCG 96.23–24); the victim "is not ninthed" for Heracles Thasios
- 2
To divide by nine.
- THE NINTHER-MEAN COMBINATION When data are only a little worse than usual, so far as wild and straggling values are concerned, we can do well enough by taking means of the results of ninthing.
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。