This is the 14348th most frequent Russian word.
открылся
"Opened up" or "revealed oneself."
Here, 'открылся' conveys the figurative sense of realization or revelation of understanding.
Ему открылся истинный смысл её слов.
The true meaning of her words became apparent to him.
Here, 'открылся' refers to the store's resumption of operations after being temporarily closed for refurbishment.
После долгого ремонта магазин наконец открылся.
After a long renovation, the store finally opened.
In this case, 'открылся' denotes the visibility or emergence of the valley's view, becoming accessible to sight.