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Free Rice. The idea is that a certain amount of rice (20 grains for each word) is given to poor individuals across the globe for each correctly chosen definition. The rice is paid for by advertisers at the bottom of the screen.
How much rice can you contribute? Let's have a Boundy family competition!
With only a few mistakes along the way, I managed to donate 1020 grains of rice and to get to vocab level 40. Who knew venesection meant phlebotomy, anyway?