Lexical Definition

‎רוּף‎ rûwph (roof) to tremble ^H:V
a primitive root

tremble.

• properly, to triturate (in a mortar), i.e. (figuratively) to agitate (by concussion)

1) (Polel) to shake, rock

See Greek: ἐφίστημι

Brown-Driver-Briggs

[‎רָפַף‎] verb Po`el shake, rock (Aramaic ‎רְפַף‎, move gently; Arabic quiver, flash, throb; also Late Hebrew ‎רִפְרֵף‎ flutter, Arabic flutter, flap wings); — Imperfect 3 masculine plural ‎עַמּוּדֵי שָׁמַיִם יְרוֺפָ֑פוּ‎ Job 26:11.

Brown-Driver-Briggs References