Jamieson, Fausset and Brown on Isaiah 14:8

8. the fir trees--now left undisturbed. Probably a kind of evergreen.

rejoice at thee--(Psa 96:12). At thy fall (Psa 35:19, 24).

no feller--as formerly, when thou wast in power (Is 10:34; 37:24).

Is 14:9-11. The Scene Changes from Earth to Hell.

Hades (the Amenthes of Egypt), the unseen abode of the departed; some of its tenants, once mighty monarchs, are represented by a bold personification as rising from their seats in astonishment at the descent among them of the humbled king of Babylon. This proves, in opposition to Warburton [The Divine Legation], that the belief existed among the Jews that there was a Sheol or Hades, in which the "Rephaim" or manes of the departed abode.