All 3 Uses

discern
in
The Hidden Oracle
(Auto-generated)

I felt as if I'd been standing on the deck of a ship when an enormous, dark, and dangerous shape passed beneath the hull—a shape almost discernible, then simply gone.†
p. 134.6 *

discernible = possible to notice or understand
I watched, petrified, until I discerned the slightest expansions and contractions in the wrappings around their chests.†
p. 269.1

discerned = noticed something that is not obvious
The Colossus stared down at us, perhaps trying to discern whether we were dying in agony yet or needed some additional pain.†
p. 321.3

discern = notice or understand something

Definitions:

(1) (discern)
to notice or understand something -- often something that is not obvious
(2) (meaning too rare to warrant focus)