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KEY: Politic.

SYN: Prudent, wise, sagacious, provident, diplomatic, judicious, cunning, wary, well devised, discreet.

ANT: Imprudent, unwise, improvident, undiplomatic, impolitic.

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KEY: Pollute.

SYN: Befoul, taint, poison, corrupt, tarnish, stain, contaminate, soil, vitiate, deprave.

ANT: Purify, clarify, disinfect, filter.

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KEY: Poltroon.