Mångata
Etymology
From Swedish, a compound of “måne” (moon) and “gata” (street or road). The image is exact: the reflection looks like a luminous street paved across the water. It names a specific optical sight that English can only describe in a full phrase.
noun · /MOHN-gah-tah/
The road-like, shimmering reflection of the moon on water.
What it names
That glittering path the moonlight lays across a lake or sea, seeming to stretch from the horizon straight to you.
Example
We sat on the dock without talking, just watching the mångata ripple across the bay.
Related idea
Turkish yakamoz names much the same glimmer of light on water; mångata specifies the moon and its distinctive road-like shape, while yakamoz is broader.