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vt.to make sth. pure by removing substances that are dirty, harmful or not wanted
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n. a group of words or a short piece of writing taken from a book, play, speech, etc. and repeated because it is interesting or useful
vt. to make a feeling, an idea, etc. stronger
n. a painting, drawing or photograph of a person, especially of the head and shoulders
n. a tall plant like grass with a hollow stem that grows in or near water
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