Joyful
Base- Joy
Joy- A feeling of great pleasure and happiness
Suffix- Ful
Ful- Full of
Noun- Joyful
Full of joy
I have never been so joyful.
Creating a new word
The word ful is full of so putting any adjective before that will be full of... To make the word Joyful putting the word joy in front of ful makes it full of joy.