From the website:
Roots© is a game of inventing language. Players combine Prefix and Suffix cards to create new words, competing for the best connection to a Subject card. Whoever delivers the best explanation for their word captures that Subject card, gaining a potential piece of their secret Win condition - but stay sharp: players can manipulate each other's progress with various Power cards, undermining opponents while advancing themselves. The result is narrative warfare in which the most creative, best spoken, and craftiest thrive.
Think Apples to Apples meets Scrabble meets a philosophy class.