- 1
To freewheel is to ride a bicycle, or drive a vehicle, down a hill without using power from your legs or the engine. On a bike, you stop pushing the pedals and let the wheels carry you. In a car, you are not using the engine to pull you along; you are just rolling. The picture is simple: the wheels run freely. People sometimes stretch it to mean “just coasting along” in life, but the core use is this physical one — downhill, no pedaling, no engine work. It is a fairly informal, everyday word if you ride bikes.
滑行（腳踏車不踩踏板、車子不靠引擎往下滑）
組成free (not using power; the wheels run freely) + wheel.
同家族的字
- freethe first half: not held / not using power
- wheelthe second half
- freewheelingthe -ing form, now often about a relaxed attitude
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。
freewheelnoun
- 1
A device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft.
- 2
The mode or state of operation thus produced: Synonym of neutral.
freewheelverb
- 1
engineeringmechanical-engineeringmechanicsOf a gear, to continue spinning after disengagement.
- 2
cyclinghobbieslifestyleOf a cyclist, to ride a bicycle without pedalling, e.g. downhill.
- On her elderly bicycle with the basketwork carrier on the handle-bars, Dorothy free-wheeled down the hill, doing mental arithmetic with three pounds nineteen and fourpence--her entire stock of money until next quarter-day.
- 3
automotivetransportvehiclesOf a motorist, to operate a motor vehicle which is coasting without power, e.g. downhill.
- Silently and gracefully I free-wheeled across the path of three juggernauts, [...] glided across the hard shoulder and came to rest halfway up a grass bank.
- 4
To operate free from constraints.
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。