The story
- Middle Dutchquacsalven
- Dutchquacksalver
- English todayquacksalver
From Dutch quacksalver (“a hawker of salve”) (now spelt kwakzalver), derived from Middle Dutch quacsalven (noun or verb), from kwaken (“to boast, to brag; to croak”) + salve (“ointment, salve”) (modern Dutch zalf) + -er (agent noun suffix).
First known use, by meaning
- from c. 1570 One falsely claiming to possess medical or other skills, especially one who dispenses potions, ointments, etc., supposedly having curative powers; a quack.
Etymology from Wiktionary, CC BY-SA 4.0.