IPA: /ˈsɪl.ki.ɪst/
KK: /ˈsɪlkiɪst/
The softest and smoothest texture, often used to describe fabric or hair that feels very pleasant to touch.
Her hair was the silkiest I had ever seen, shining in the sunlight.
Comparative: silkier
Superlative: silkiest
Silkiest is formed from "silk" (from Old English "seolc", meaning a fine, soft fabric) and the suffix "-iest" (meaning most). The word "silkiest" describes something that has the most qualities of silk, particularly its softness and smoothness.
Think of the word 'silk' which represents a soft fabric, and remember that 'silkiest' means the most soft or smooth, just like the finest silk.