"Happiness" is the Engpsh word for "幸福".
The word "happiness" originated from the Old Engpsh word "hap" which means "good luck, fortune" and "ness" which means "state or condition".
Examples:
I wish you happiness and success in your new job.
(祝你在新工作中幸福和成功。)
Money can't buy happiness.
(金钱不能买到幸福。)
The key to happiness is to pve in the present moment.
(通往幸福的关键是活在当下。)