What is the meaning of wie in the following sentence? And what is this usage/construction called?
Minutenlang wurde wie wild an der Tür geklopft und gerüttelt.
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The meaning here is "like". Compare English "like crazy".
In this usage, "wie" is considered a Vergleichspartikel (comparison particle).
The combination of "wie" with an adjective is not unusual in German. A similar expression is "wie verrückt" which has the same meaning as the aforementioned English "like crazy".