This is the 6659th most frequent Russian word.
merko
The word "мерко" does not exist in standard Russian; it may be a typo or misspelling.
In this sentence, "меркли" is used metaphorically to describe the fading of hopes or desires over time.
Её надежды меркли с каждым днём, когда реальность становилась очевидной.
Her hopes dimmed with each passing day as reality became apparent.
Here, "меркли" denotes the visual fading or diminishing of city lights in comparison to the emerging starlight.
Вечером меркли огоньки города, уступая звёздам ночного неба.
In the evening, the city's lights dimmed, yielding to the stars of the night sky.
The word "меркло" is used here to describe the sun as fading or dimming, primarily reflecting a visual dimness.