In which word does the prefix in- mean the same as it does in the word inauguration? . the choices are the followig: inward. indigestion. insert

Insert
 
The word inauguration is used in the ancient time meaning to put someone or to introduce someone in the public while the word insert refers to the act of introducing someone into a body or a group. The prefix 'in" in the word indigestion and inward does not mean the same with inauguration and insert. 

Isaw a snowboarder sliding.i went snowboarding yesterday. everybody snowboards.how was snowboarding.