That means a sharpened knife. The knife has been applied to a whet stone and is nice and sharp.
Comes from: Whetstone used to sharpen Blades such as knifes
The beach in the winter
This phrase suggests that the wind is sharp and cutting, emphasizing its forcefulness and potential danger. It conveys the idea of a strong, biting wind that can feel as sharp as a knife when it blows.
"He whetted his appetite!"
To whet means to rub on the surface of a flat stone to create a sharp edge
The unduly media attention to the case whetted the curiosity of common man
wedded
knife
If you mean a regular straight blade knife and not a pocket knife, the case is called a sheath.
AKA Shaman - 2011 Wetted Wings and a Whetted Wrist 1-7 was released on: USA: 1 June 2011
knife
A knife mainly intended to be used to cut up vegetables