[Lostgaeriel]

That's Gamling speaking to Éomer (& Aragorn) about the wild men of the hills, at Helm's Deep. (Gamling had something in common with Tolkien - he knew ancient languages. He translates the 'bellowing' for Éomer.)

‘Yet dawn is ever the hope of men,’ said Aragorn.
‘But these creatures of Isengard, these half-orcs and goblin-men that the foul craft of Saruman has bred, they will not quail at the sun,’ said Gamling. ‘And neither will the wild men of the hills. Do you not hear their voices?’
‘I hear them,’ said Éomer; ‘but they are only the scream of birds and the bellowing of beasts to my ears.’
‘Yet there are many that cry in the Dunland tongue,’ said Gamling. ‘I know that tongue. It is an ancient speech of men, and once was spoken in many western valleys of the Mark. Hark! They hate us, and they are glad; for our doom seems certain to them. “The king, the king!” they cry. “We will take their king. Death to the Forgoil! Death to the Strawheads! Death to the robbers of the North!” Such names they have for us. Not in half a thousand years have they forgotten their grievance that the lords of Gondor gave the Mark to Eorl the Young and made alliance with him. That old hatred Saruman has inflamed. They are fierce folk when roused. They will not give way now for dusk or dawn, until Théoden is taken, or they themselves are slain.’