This is the 549th most frequent Czech word.
zdraví
Health.
The noun 'zdraví' here refers to 'health', indicating a state of physical or mental well-being.
Zdraví je nejdůležitější věc v životě.
Health is the most important thing in life.
In this sentence, the noun 'zdraví' again specifically refers to 'health', highlighting the aspect of its maintenance and enhancement.
Zlepšení zdraví vyžaduje pravidelný pohyb a zdravou stravu.
Improving health requires regular exercise and a healthy diet.
The verb 'zdraví' derives from the root meaning 'health' but is used here to mean 'greets', as in expressing a wish for someone's wellness when seeing them.