This is the 579th most frequent Chinese word.
清
"Clear, pure, or clean."
Here, "清" is used as an adjective meaning 'clear' or 'pure', describing the transparency and clarity of the water.
湖水清澈见底。
The lake water is crystal clear.
In this context, "清算" uses "清" in a verb form meaning 'to clear', indicating the action of settling or clearing accounts.
请将账目清算一下。
Please settle the accounts.
Here, "清晨" uses "清" as part of a compound noun meaning 'early morning' (with '清' conveying a sense of freshness or clarity associated with morning hours).