These words all describe feeling, showing or giving pleasure.
happyfeeling, showing or giving pleasure; satisfied with something or not worried about it:
a happy marriage/memory/childhood幸福的婚姻／回忆／童年
I said I’d go, just to keep him happy.我说我要去只是为了让他高兴。
satisfiedpleased because you have achieved something or because something has happened as you wanted it to; showing this:
She’s never satisfied with what she’s got.她对自己所得到的从不感到满足。
a satisfied smile满意的微笑
content[not before noun] happy and satisfied with what you have:
I’m perfectly content just to lie in the sun.只在太阳下躺一躺我就心满意足了。
contentedhappy and comfortable with what you have; showing this:
a contented baby心满意足的小宝贝
a long contented sigh惬意的长叹
content or contented?用 content 还是 contented？Being contented depends more on having a comfortable life; being content can depend more on your attitude to your life: you can learn to be content with something by changing your attitude to it. People or animals can be contented but only people can be content.
joyful(rather formal) very happy; making people very happy
blissfulmaking people very happy; showing this happiness:
three blissful weeks away 无忧无虑的三周假期
joyful or blissful?用 joyful 还是 blissful？Joy is a livelier feeling; bliss is more peaceful.Patterns
happy/satisfied/content/contented with something
a happy/satisfied/contented/blissful smile
a happy/joyful occasion/celebration
to feel happy/satisfied/content/contented/joyful