רָעַד râʻad — to shudder (more or less violently)
Translated in the KJV as tremble.
a primitive root; to shudder (more or less violently).
râʻad in each stem
Hiph'il
Participle (active) 2
Then all the men of Judah and Benjamin gathered themselves together unto Jerusalem within three days. It was the ninth month, on the twentieth day of the month; and all the people sat in the street of the house of God, trembling because of this matter, and for the great rain.
And he said unto me, O Daniel, a man greatly beloved, understand the words that I speak unto thee, and stand upright: for unto thee am I now sent. And when he had spoken this word unto me, I stood trembling.
Qal (Pa'al)
Wayyiqtol 1
He looketh on the earth, and it trembleth: he toucheth the hills, and they smoke.
What the stems mean
A Hebrew verb is its root letters set into a pattern. The pattern — the binyan — is the grammar's way of saying three things at once: whether the action is simple, intensive or causative, and whether its subject is active, passive or reflexive. That is why one Hebrew word can need six English ones. All seven binyanim, explained ›