Quack

fals

(falsely presented as having medicinal powers)

skottu

(falsely presented as having medicinal powers)

svika

(falsely presented as having medicinal powers)

andagagg

(sound made by a duck)

falsari

(charlatan)

fúskari

(charlatan)

guss

(sound made by a duck)

loddari

(charlatan)

skottulæknir

(fraudulent or incompetent doctor of medicine)

svikari

(charlatan)

gagga

(to make a noise like a duck)

gussa

(to make a noise like a duck)