This is the 17596th most frequent Polish word.
zdrowych
"Healthy."
Here, 'zdrowych' is used as an adjective in its genitive plural form, describing the holidays ('świąt') as healthy.
Życzę ci zdrowych i spokojnych świąt.
I wish you healthy and peaceful holidays.
In this sentence, 'zdrowych' is an adjective in its genitive plural form, modifying 'products' ('produktów') to indicate they are healthy.
Dbam o spożywanie zdrowych produktów każdego dnia.
I care about consuming healthy products every day.
Here, 'zdrowych' is again an adjective in its genitive plural form, describing 'habits' ('nawyków') as healthy.