He cowered in the midst of the milky water
(он съежился посреди мутной: «молочной» воды), as though the vastness were pressing in upon him with overwhelming force (как будто безбрежность =He cowered in the midst of the milky water, as though the vastness were pressing in upon him with overwhelming force, brutally crushing him with its complacent awfulness. He began to shake as with an ague-fit, till the gun fell from his hand with a splash. This served to rouse him. He fought with his fear and pulled himself together, groping in the water and recovering the weapon. He hitched his pack farther over on his left shoulder, so as to take a portion of its weight from off the injured ankle. Then he proceeded, slowly and carefully, wincing with pain, to the bank.