PJ Ex19:16 :וזע כל עמא די במשריתא‏ :
See the entire entry for zwˁ vb. to move; to tremor

PJ Ex19:16 :והוה קלין דרעים וברקין ועננא תקיף קטיר על טוורא‏ : there were sounds of thunder and lightnings, with a thick cloud condensed on the mountain
See the entire entry for rˁe/am, raˁmā n.m. thunder