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Hale is an old word meaning healthy, now largely fossilised in the phrase hale and hearty.

Collins defines hale as “healthy and robust”, and gives the following usage note:

If you describe people, especially people who are old, as hale, you mean that they are healthy.

She is remarkable and I’d like to see her remain hale and hearty for years yet.

I think this has the meaning you’re looking for, and also tends to be associated with age, so it has the right connotations.

The single word hale is usable on its own, but the phrase hale and hearty is probably more common. Either should work for your purposes.

Hale is an old word meaning healthy, now largely fossilised in the phrase hale and hearty.

Collins defines hale as “healthy and robust”, and gives the following usage note:

If you describe people, especially people who are old, as hale, you mean that they are healthy.

She is remarkable and I’d like to see her remain hale and hearty for years yet.

I think this has the meaning you’re looking for, and also tends to be associated with age, so it has the right connotations.

Hale is an old word meaning healthy, now largely fossilised in the phrase hale and hearty.

Collins defines hale as “healthy and robust”, and gives the following usage note:

If you describe people, especially people who are old, as hale, you mean that they are healthy.

She is remarkable and I’d like to see her remain hale and hearty for years yet.

I think this has the meaning you’re looking for, and also tends to be associated with age, so it has the right connotations.

The single word hale is usable on its own, but the phrase hale and hearty is probably more common. Either should work for your purposes.

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source | link

Hale is an old word meaning healthy, now largely fossilised in the phrase hale and hearty.

Collins defines hale as “healthy and robust”, and gives the following usage note:

If you describe people, especially people who are old, as hale, you mean that they are healthy.

She is remarkable and I’d like to see her remain hale and hearty for years yet.

I think this has the meaning you’re looking for, and also tends to be associated with age, so it has the right connotations.