SLEEKEST

Adjective

sleekest

superlative form of sleek: most sleek

Source: Wiktionary

SLEEK

Sleek, a. [Compar. Sleeker; superl. Sleekest.] Etym: [OE. slik; akin to Icel. slikr, and OE. sliken to glide, slide, G. schleichen, OHG. slihhan, D. slik, slijk, mud, slime, and E. slink. Cf. Slick, Slink.]

1. Having an even, smooth surface; smooth; hence, glossy; as, sleek hair. Chaucer. So sleek her skin, so faultless was her make. Dryden.

2. Not rough or harsh. Those rugged names to our like mouths grow sleek. Milton.

Sleek, adv.

Definition: With ease and dexterity. [Low]

Sleek, n.

Definition: That which makes smooth; varnish. [R.]

Sleek, v. t. [imp. & p. p. Sleeked;p. pr. & vb. n. Sleeking.]

Definition: To make even and smooth; to render smooth, soft, and glossy; to smooth over. Sleeking her soft alluring locks. Milton. Gentle, my lord, sleek o'er your rugged looks. Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition