Hangman is a simple word game, one person thinks of a word and tells the other players how man letters it has, the other players must guess what word it is one letter at a time.
Each player guesses one letter at a time, going in rotation with the other players. Guessing wrong is a point against you, leading to the man being hanged.
Traditionally there are 6 guesses before the man is hanged, so making an educated guess based on the letters seen is a good idea.