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droplet - n. a very small drop of liquid
tough - adj. very difficult to do or deal with
tight - adj. difficult to move : fastened, attached, or held in a position that is not easy to move
surgical - adj. of or relating to the process of performing a medical operation
global - adj. involving the whole world
sew - v. to make or repair something (such as a piece of clothing) by using a needle and thread
