There is no specific word "nongood" in English. However, if you meant to ask about the word "no-good", which is a common expression in English, I can provide some information on its etymology.
The term "no-good" is a compound word composed of two parts: "no" and "good".
The word "no" is derived from the Old English word "nā", meaning "not" or "never". It is often used to indicate negation or absence.
The word "good" comes from the Old English word "gōd", which meant "virtuous", "excellent", or "worthy". Over time, it has come to represent something that is positive, desirable, or of high quality.