principio[Espagnol]

nom
1 : a basic truth or law or assumption
2 : the first part or section of something
3 : (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)
4 : rule of personal conduct
5 : the event consisting of the start of something
6 : the top of something
7 : the place where something begins, where it springs into being
8 : the act of starting something