The speakeasy got its name because one had to whisper a code word through a slot in a locked door to gain admittance during Prohibition. Interestingly enough on a visit to Portugal in 1986 I had to go through a similar ritual to get into a nightclub there. In Dutch, this word means juniper, and is used to describe Holland's gin because juniper is one of the principal ingredients with which it is flavoured.
Dutch gin is supposed to be drunk straight and icy cold.
The flavour of Dutch gin is stronger than that of the London dry style, and it has a fuller bouquet. It is heavy-bodied and strongly flavoured with a malty taste and aroma. Some brands of Dutch gin are de Kuyper, Bols, Hasekamp and Kokma. Dr Sylvius was a professor of medicine at Holland's famous University of Leyden. He was looking for an inexpensive, but effective diuretic to use in the treatment of kidney disorders.