How to pronounce kosher:
To kasher; to prepare (for example, meat) in conformity with the requirements of the jewish law.
Fit for use or consumption, in accordance with jewish law (especially relating to food).
Example: "David's mother kept a kosher kitchen, with separate sets of dishes for meat and for dairy."
(by extension) in accordance with standards or usual practice.
Example: "Is what i have done kosher with mr. smith?"
In a kosher manner; in accordance with kashrut.