- 1
To become smaller or weaker little by little, often until it stops: rain tapers off, sales taper off, a sound tapers off. Doctors also use it for slowly stopping a medicine instead of stopping at once — you taper off a drug, or taper it off.
逐漸減少（到停止）；（藥物）慢慢減量停掉
原始詞典資料2 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。
taper offverb/ˈteɪpə ɒf/
- 1
To diminish or lessen gradually; to become or make smaller, slower, quieter, etc.
- Months after they printed the article, the number of angry letters finally started to taper off.
- The traffic tapers off towards mid-May, but it continues in some measure throughout the off-peak months.
- 2
Used other than figuratively or idiomatically: see taper, off.
- The glass tapers off at the top.
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。