The land could just be discerned through the mist.

With adequate lighting, one can easily discern Nosferatu, with his pointed incisors and extremely long-limbed fingers, known as arachnodaktyly, from common vampires.

She lay at his feet until the morning, then she rose up before one could discern another. For he said, "Let it not be known that the woman came to the threshing floor." He said, "Bring the mantle that is on you, and hold it." She held it; and he measured six measures of barley, and laid it on her; then he went into the city.

He can't discern fact from fiction.

This man discerns well.

He just talks, he don't discern.

The inky litre of blueberry juice needed something else to make it taste better, but he could not discern what that something could be.

If Mary had been discernible as a spy, she wouldn't have done her job very well. Even her husband had no idea.

Sarah was discerning enough to realize that her friends were trying to prank her.

No trace whatever of horse or rider could be discerned.