health是名词,意为“健康”｡ healthy是由名词health加后缀-y派生出来的同义形容词｡ healthy意为“健康的”､“强壮的”,其同义词为fit,相当于well或strong.其反义词是unhealthy或者weak.例如：
His health is not good.他的身体不好｡
Here’s to your health!
—How are you recently?你近来怎样? —Oh,I’m very healthy.哦,我很好｡
As he just left hospital,he is still not so healthy.(=As he just left hospital,he is still quite unhealthy.=As he just left hospital,he is still quite weak.) 因为刚刚出院,他的身体仍然相当虚弱｡