The verb kibdhlia/w literally means "to be like the adulterated", referring to the colour of adulterated gold (LSJ s.v.).
The verb is cited here in the present participle, masculine nominative plural -- surely quoted from [Aristotle], Problems 859b1 (&3) "Why do both the jaundiced and the starving have swollen feet?"). See also Hesychius kappa2597 and Photius, Lexicon kappa691 Theodoridis, both with the corresponding accusative; and cf. more generally Hesychius kappa2596 and Photius kappa690 (infinitives).
Hesychius explains the verb as "those bothered by ki/bdhlis", a kind of dross in metal, and derives ki/bdhlos in turn from ki/bdhlis. Other authorities present similar nouns (ki/bdos, kibdhli/a: LSJ s.v. ki/bdhlos), but even if the etymology of ki/bdhlos is accurate, ki/bdhlis is not an affliction bothering people: the metaphor from the colour of adulterated gold is correct.