This is the 7384th most frequent Russian word.
голубая
"Golubaya" means "light blue" or "blue" (feminine form).
In this sentence, 'голубая' describes the water's color, emphasizing its clarity and freshness.
У озера была голубая вода.
The lake had clear blue water.
The adjective 'голубая' here is used to describe the color of the bird.
Это голубая птица.
This is a blue bird.
Here, 'голубая' metaphorically represents something idealistic or cherished, associated with calmness or optimism.