'grape-tasting' is a compound word formed from 'grape' and 'tasting', where 'grape' refers to the fruit and 'tasting' refers to the act of perceiving flavor.

'Grape' comes from the Old French word 'grape', meaning 'bunch of grapes', and 'tasting' comes from the Old French 'taster', meaning 'to taste'.

Initially, 'grape-tasting' simply referred to the act of tasting grapes, but it evolved to describe anything that has a grape-like flavor.