miasma

He had not felt equably well since the night of Gabriel's burial in the miasmic air of the mountain.

Sometimes a blue miasmic haze settled down, and the dry raspy hides of the elephants grew damp and they fretted at their chains.

And over all, rising from pools and bare ground and jungle alike, was a thin, miasmic mist.

Day after day they pushed forward, skirting at times the edge of miasmic swamps, and generally sticking to the desolate plain.