Learn how to say Walnut correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word walnut:
1the large wrinkled edible seed of a deciduous tree, consisting of two halves contained within a hard shell which is enclosed in a green fruit.
2 (also walnut tree) the tall tree which produces walnuts, with compound leaves and valuable ornamental timber that is used chiefly in cabinetmaking and gun stocks.
Genus Juglans, family Juglandaceae: several species, including the common (or English) walnut (J. regia)
late Old English walh-hnutu, from a Germanic compound meaning ‘foreign nut’: