descendants

people, animals, or plants related to an individual or a group that is no longer living 

Many scientists believe that birds are the descendants of dinosaurs.

aviation

the science of building and flying aircraft 

Amelia Earhart may be the most famous woman in aviation history.

unconstitutional

not in agreement with the rules in the U.S. Constitution 

In 1954, the Supreme Court ruled that laws separating black people and white people are unconstitutional.

suppress

to hold back or to control the expression of something 

Tracy could barely suppress her giggles during class.

revived

brought something back into use or restored interest in it 

The store’s failing business was revived after the best-selling toys hit the shelves.