This is the 1344th most frequent German word.
ard
"ARD" is not a standard German word; it refers to "Arbeitsgemeinschaft der öffentlich-rechtlichen Rundfunkanstalten," Germany's consortium of public broadcasters.
Here, 'ARD' refers to the German broadcaster, a proper noun.
Das Programm auf ARD beginnt um acht Uhr.
The program on ARD starts at eight o'clock.
In this sentence, 'hart' is a German word meaning 'hardly' or 'intensively', used as an adverb.
Er arbeitet hart, um seine Ziele zu erreichen.
He works hard to achieve his goals.
Here, 'hart' is addressed as a term to explain its definition and use in German sentences.