start

to come into existence or begin to happen

to begin to engage in something such as a profession, period of education, etc.

to begin to move toward a specific direction

to leave a place or begin a journey

to suddenly move one's body because something surprising or frightening has happened

to cause something to begin taking place

to make something come into being

to come into being

to cause a machine to begin to work

(of a machine) to begin operating or being used

to cause or enable someone to begin doing something, especially as a profession