freewheel

nouns

a clutch (as on the rear wheel of a bicycle) that allows wheels to turn freely (as in coasting)

freewheel

is a type of (narrower)

a coupling that connects or disconnects driving and driven parts of a driving mechanism

"this year's model has an improved clutch"

live unhurriedly, irresponsibly, or freely

"My son drifted around for years in California before going to law school"

drift, freewheel

is derived from

coast in a vehicle using the freewheel

freewheel

is a type of (narrower)

move effortlessly; by force of gravity