English word tuber comes from Latin tuber

Detailed word origin of tuber

Dictionary entry	Language	Definition
tuber	Latin (lat)	A hump, bump, swelling, protuberance; excrescence. A truffle (any of various edible fungi, of the genus Tuber). The cyclamen or other similar plants with tuberous roots (usually feminine) a kind of tree or bush of foreign origin, possibly the azarole (Crataegus azarolus). (usually masculine) the fruit of the above tree.
tuber	English (eng)	(horticulture) A thickened rootstock.. A fleshy, thickened underground stem of a plant, usually containing stored starch, as for example a potato or arrowroot.

Words with the same origin as tuber