This Aramaic participle appears in Daniel 5:6, describing King Belshazzar's physical reaction to the writing on the wall: his knees were 'knocking together.' The verb captures the involuntary trembling of terror, with knees literally striking each other. The idiom 'one against another' emphasizes the violent shaking. This physical manifestation of fear—knees too weak to stand, trembling uncontrollably—illustrates Belshazzar's complete psychological collapse at the supernatural sign. The Aramaic form parallels Hebrew vocabulary for striking or beating.