This is the 942nd most frequent Dutch word.
harde
"Hard" or "firm" (depending on context).
Here, 'harde' describes the noun 'wind', depicting its force or intensity.
De harde wind blies de bladeren door de lucht.
The strong wind blew the leaves through the air.
In this sentence, 'harde' qualifies 'klap', indicating the firmness or strength of the impact.
Hij gaf een harde klap op de tafel.
He gave a hard bang on the table.
Here, 'harde' attributes the quality of being physically rigid to the 'shoes.'