What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
1Of an object: propelled into something thoroughly, effectively, or with great force.
2Of a vehicle, now usually a motor vehicle: skilfully, expertly, or smoothly controlled by the driver.
Early 16th century; earliest use found in John Fitzherbert (d. 1531). From well + driven, past participle of drive.