In case I'm not too late:
*) root (as in the part of a tree or plant that is below the earth, sucking in water and stuff), NOT the starchy storage part we usually use as food.
I'm currently "eating" a liquorice root. How do I translate that? 'oqQar has "tuber" as definition, which implies that it's more along the lines of a potato or perhaps even turnip (we have no word for "beet" apparently).
What I'm currently eating is part of the root system, cut arbitrarily from it, more like a plants vein than a storage depot.
Christoph