IPA: //ˈsliːkiər//
KK: /ˈsliːki/
Having a smooth, glossy, and attractive appearance; more polished or stylish than something else.
The new car model looks sleeker than the previous version.
Comparative: sleekier
Superlative: sleekiest
Sleekier → The word is derived from "sleek" (from Old Norse *slikr*, meaning smooth or sleek) and the comparative suffix "-ier" (meaning more). The term "sleekier" refers to something that is more smooth or glossy in appearance.
Think of something that is 'smooth' ('sleek') and 'more' ('-ier') — that's why sleekier means more smooth or glossy.