verb (used without object)
Origin of quack1
verb (used with object)
Origin of quack2
Examples from the Web for quack
Humor and historical distance allow me to illustrate how a quack operates in a way that I could not with a contemporary example.The Strange, True Tale of the Old-Timey Goat Testicle-Implanting 'Governor'|Penny Lane|September 16, 2014|DAILY BEAST
Google his name, and the top two related searches come up as “Daniel Amen scam” and “Daniel Amen quack.”
Duck calls are short, whistle-like tools used to emit “quack” sounds in order to lure ducks for hunting.
Even the quack doctor, Dr. Gopalarajan, derives a real glimmer of joy from believing he has “helped, not harmed” a fellow being.Must Read Fiction: ‘Prague Fatale,’ ‘Derby Day’ and More|Malcolm Forbes, Hillary Kelly, Mythili Rao|May 9, 2012|DAILY BEAST
Especially should we refuse to patronize the quack advertiser.How to Live|Irving Fisher and Eugene Fisk
So a French quack adorns his shop with a gilded bust of Hippocrates!
This essential information obtained, the quack at once sets his moral rack to work.
Before long the government will pass laws on this baneful, shameful, quack advertising.Evening Round Up|William Crosbie Hunter
The change from speaking to singing voice is where the quack enters with his mystery.Seed Thoughts for Singers|Frank Herbert Tubbs
Word Origin for quack
- an unqualified person who claims medical knowledge or other skills
- (as modifier)a quack doctor
Word Origin for quack
"to make a duck sound," 1610s, earlier quake (1520s), variant of quelke (early 14c.), of echoic origin (cf. Middle Dutch quacken, Old Church Slavonic kvakati, Latin coaxare "to croak," Greek koax "the croaking of frogs," Hittite akuwakuwash "frog"). Middle English on the quakke (14c.) meant "hoarse, croaking." Related: Quacked; quacking.
"medical charlatan," 1630s, short for quacksalver (1570s), from obsolete Dutch quacksalver (modern kwakzalver), literally "hawker of salve," from Middle Dutch quacken "to brag, boast," literally "to croak" (see quack (v.)) + salf "salve," salven "to rub with ointment" (see salve (v.)). As an adjective from 1650s. The oldest attested form of the word in this sense in English is as a verb, "to play the quack" (1620s). The Dutch word also is the source of German Quacksalber, Danish kvaksalver, Swedish kvacksalvare.
duck sound, 1839, from quack (v.).