Submarine - A boat that goes under the water., Subtitle - Words at the bottom of a movie, Submerge - To go underwater, Supervise - To watch over someone, Superpower - A special ability beyond norma, Supersize - To make something larger, International - Between different countries, Interlock - To fit together tightly, Interject - To say something in the middle of a conversation, Intercom - A system to talk to people in a building, Subheading - A smaller title under the main title, Subway - A train that runs underground, Superhuman - Stronger or better than a normal person, Intersection - Where two streets meet, Interfere - To get involved in someone else's business,

Prefixes 'sub-', 'super-', and 'inter-

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