freewheel

n. 自由飛輪

vi. 隨心所欲、憑慣性滑行

學術名詞

自由輪：電機工程、機械工程
飛輪：機械工程

英文釋義

a clutch (as on the rear wheel of a bicycle) that allows wheels to turn freely (as in coasting)
live unhurriedly, irresponsibly, or freely
coast in a vehicle using the freewheel