'age-restricted' originates from the combination of 'age' and 'restricted', where 'age' refers to the length of time a person has lived and 'restricted' means limited or controlled.

'age-restricted' evolved from the need to categorize content and activities based on age appropriateness, becoming a common term in modern English.

Initially, it meant 'limited by age', and this meaning has largely remained the same in modern usage.