He is immortal, not because he alone among creatures has an inexhaustible voice, but because he has a soul, a spirit capable of compassion and sacrfice and endurance.
New developments in offshore wind-farm technology can provide an inexhaustible supply of green energy, while mineral deposits on the seafloor, if mined sustainably, offer the raw ingredients for the batteries to store it.
Now then, right at this spot the sea covers entire forests that sank underwater in prehistoric times; today, turned to stone, transformed into carbon fuel, they offer me inexhaustible coal mines.
Mrs. Gardiner had seen Pemberley, and known the late Mr. Darcy by character perfectly well. Here, consequently, was an inexhaustible subject of discourse.