intro-intro- /ɪntrə/ prefix 
into, especially into the inside: 
introspection (=examining your own feelings)
into, especially into the inside: introspection (=examining your own feelings)- masterly
- Mastermind
- mastermind
- Master of Arts
- Master of Business Administration
- master of ceremonies
- Master of Foxhounds
- Master of Science
- Master of the Rolls
- masterpiece
- master plan
- master race
- master's
- Masters and Johnson
- master's degree
- Masters Tournament
- masterstroke
- Masters, William Howell
- master switch
- masterwork
- mastery
- masthead
- mastic
- masticate
- mastication