KEY: Effrontery.
SYN: Barefacedness, impudence, brass.
ANT: Modesty, timidity, bashfulness, coyness.
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KEY: Effulgence.
SYN: Splendor, lustre, brilliancy, luminosity.
ANT: Darkness, obscuration, tenebrosity.
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KEY: Effuse.
SYN: Copious, effluent, abundant.