Slinkiness refers to a sense of undulating grace and movement. Synonyms for this word include suppleness, fluidity, agility, litheness, and flexibility. Each of these words carries an element of smoothness, elegance, and effortless grace, often used to describe movements like those of a dancer or a feline. Other synonyms for slinkiness include sinuosity, sinuousness, and serpentine, which convey a sense of serpent-like grace and slithering movement. Occasionally, the word slinkiness is used to describe a sense of stealth or furtiveness, in which case synonyms might include sneaky, surreptitious, or sly. Regardless of the context, slinkiness suggests a sense of fluidity and effortless grace that is pleasing to the eye.