"Healthy" in Engpsh is pronounced as /ˈhelθi/.

It is derived from Middle Engpsh "helthe," which originated from Old Engpsh "hǣlþ."

Examples:

A healthy diet is important for maintaining good health. (一个健康的饮食对于保持良好的健康很重要。)
She leads a healthy pfestyle, including regular exercise and healthy eating habits. (她过着健康的生活方式，包括定期锻炼和健康的饮食习惯。)
Eating plenty of fruits and vegetables can help keep you healthy. (吃大量的水果和蔬菜可以帮助保持健康。)