Sir Gawain takes the challenge and cuts the green knights head off.
The green knight leaves
In one year time I will return the swing
The green knight challenges them to a game. If they cut his head off and he doesn't die then he has to return the favor.
Sir Gawain meets king bertilak
Ill give you whatever I get from my hunt and you'll give me whatever you find here
Sure, I agree.
Sir gawain cuts the green knights head off and completes his side of the challenge.
The green knights turn
Yes I'm ready
Its my turn no are you ready.
The green knight doesn't die and he picks up his head and tells sir gawain in one years time he will recieve his axe swing and tells him to meet him at the green cathedral
The green knight spares him.
Why didn't you cut my head off?
I didn't cut your head off because you were pretty loyal and stayed to your chivalry.
The king told him for everyday he was there he had to give him something in return.
The green knight take his turn to cut Sir Gawain's head off but only scratch's it due to his good doings and loyalty as a knight.
The green knight tell him he didn't kill him because his loyalty to his chivalry as a knight.