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well-groomed and neatly tailored; especially too well-groomed;
"sleek figures in expensive clothes"
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designed or arranged to offer the least resistant to fluid flow;
"a streamlined convertible"
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having a smooth, gleaming surface reflecting light;
"glossy auburn hair"
"satiny gardenia petals"
"sleek black fur"
"silken eyelashes"
"silky skin"
"a silklike fabric"
"slick seals and otters"