vapour

The farther wall of the orchard was already invisible, and the trees were standing out of a swirl of white vapour.

Rank reeds and lush, slimy water-plants sent an odour of decay and a heavy miasmatic vapour onto our faces, while a false step plunged us more than once thigh-deep into the dark, quivering mire, which shook for yards in soft undulations around our feet.