'heal-all' originates from English, formed by combining 'heal' (meaning 'to make healthy') and 'all' (meaning 'everything'), referring to a plant believed to cure all ailments.

'heal-all' was used in English herbal texts from the 16th century to describe Prunella vulgaris, a plant thought to have universal healing properties.

Initially, it referred to a plant believed to cure all diseases, and this meaning has remained largely the same in modern usage.