materialisation

noun materialisation

• disappearance — the act or an instance of disappearing; a ceasing to be seen or to exist.
• beginning — The beginning of an event or process is the first part of it.
• cause — a person or thing that acts, happens, or exists in such a way that some specific thing happens as a result; the producer of an effect: You have been the cause of much anxiety. What was the cause of the accident?
• commencement — The commencement of something is its beginning.
• origin — something from which anything arises or is derived; source; fountainhead: to follow a stream to its origin.