This is the 7755th most frequent German word.
harfuch
It seems "harfuch" isn't a German word. It may be a misspelling or not in common usage.
The subject of the sentence illustrates 'Harfuch' as a topic or entity.
Harfuch ist ein seltenes Wort.
Harfuch is a rare word.
The object of the sentence highlights 'Harfuch' as being looked up or searched.
Ich habe das Wort Harfuch im Wörterbuch gefunden.
I found the word Harfuch in the dictionary.
'Harfuch' is questioned directly, used as the focal word of inquiry.