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ACROSS
1)  (of hair) having waves
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  the activity of persuading someone to buy
4)  french soldier and writer whose descriptions of sexual perversion gave rise to the term `sadism' (1740-1814)


DOWN
1)  a person who is physically weak and ineffectual
2)  a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
3)  elevated open grassland in southern africa
4)  a university in connecticut

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wavy
urea
sell
sade