3 2 1! is a Two Player game
The goal is for both players to submit the same word
...but they cannot communicate
It is easiest to understand through example:
Player One thinks of the random word "plastic"
Player Two thinks of another random word "container"
The two words are revealed to both players
Player One connects these two words and forms the guess "bag"
Player Two also thinks of a way to connect these words and guesses "bin"
These words are again revealed to both players
Player One now connects these two words and guesses "garbage"
Player Two thinks about a connection between "bag" and "bin" and guesses "garbage"
Their guesses are revealed and the Players win the game