To Momaday, what did grandmother's prayers sound like? What emotions did she express in them?

From the text:

Now that I can have her only in memory, I see my grandmother in the several postures that were peculiar to her: standing at the wood stove on a winter morning and turning meat in a great iron skillet; sitting at the south window, bent above her beadwork, and afterwards, when her vision failed, looking down for a long time into the fold of her hands; going out upon a cane, very slowly as she did when the weight of age came upon her; praying. I remember her most often at prayer. She made long, rambling prayers out of suffering and hope, having seen many things. I was never sure that I had the right to hear, so exclusive were they of all mere custom and company. The last time I saw her she prayed standing by the side of her bed at night, naked to the waist, the light of a kerosene lamp moving upon her dark skin. Her long, black hair, always drawn and braided in the day, lay upon her shoulders and against her breasts like a shawl. I do not speak Kiowa, and I never understood her prayers, but there was something inherently sad in the sound, some merest hesitation upon the syllables of sorrow. She began in a high and descending pitch, exhausting her breath to silence; then again and again— and always the same intensity of effort, of something that is, and is not, like urgency in the human voice.