'weed-free' originates from the combination of 'weed' and 'free', where 'weed' refers to unwanted plants and 'free' means 'without'.

'Weed-free' evolved from the need to describe areas or products that are devoid of weeds, combining 'weed' and 'free' to form a compound adjective.

Initially, it meant 'without weeds', and this meaning has remained consistent in modern usage.