'starch-digesting' is a compound word formed from 'starch' and 'digesting', where 'starch' refers to a carbohydrate and 'digesting' is the present participle of 'digest', meaning 'to break down food'.

'starch-digesting' was formed in modern English by combining the noun 'starch' and the participle 'digesting' to describe something that digests starch.

Initially, it simply described the action of digesting starch, and it continues to be used in this sense, especially in scientific and nutritional contexts.