This is the 12252nd most frequent Polish word.
mienią
"To shimmer" or "to gleam."
Here, 'mienią' is used to describe the shimmering or sparkling effect of stars visible in the sky.
Gwiazdy mienią się na nocnym niebie.
The stars sparkle on the night sky.
In this sentence, 'mienią' conveys the changing or shimmering of colors seen in the fabric under light.
Mienią barwy lata w tej pięknej sukni.
The colors of summer shimmer in this beautiful dress.
Here, 'mienią' metaphorically relates to the visible expression of emotions or state of being radiated outwardly.