In the planning and design stages of a project, various design estimates reflect the progress of the design. At the very early stage, the screening estimate or order of magnitude estimate is usually made before the facility is designed, and must therefore rely on the cost data of similar facilities built in the past.
Ammon /am-mon/ [2 sylls.] as a boys' name is pronounced AY-mon. It is of Hebrew origin, and the meaning of Ammon is teacher, builder. Biblical: one of the sons of David. Also a place name for a country northeast of the Dead Sea.
Perhaps you are asking the origin of the English word sin. The word sin. comes from the Middle English word sinne, which is derived from the Old. English word synn. Probably the word synn derives from the Germanic root. sunta or the Latin word sons, both of which mean guilty.