"sleeker" in the adjective sense
1. sleek
well-groomed and neatly tailored especially too well-groomed
"sleek figures in expensive clothes"
2. streamlined, aerodynamic, flowing, sleek
designed or arranged to offer the least resistant to fluid flow
"a streamlined convertible"
3. satiny, sleek, silken, silky, silklike, slick
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"
Source: WordNet® (An amazing lexical database of English)
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