The road was barely visible through the thick fog, but Vanessa kept walking.
There was no visible evidence of tampering.
The big building was visible all the way from house.
He thought he was well hidden, but the top of his head was visible.
The package is not visible from my current vantage point.
The stars were only visible once the sun had set and the sky darkened.
To make the word "visible" an adverb, you can transform it into "visibly." This is done by adding the suffix "-ly," which is commonly used to convert adjectives into adverbs. For example, in a sentence, you could say, "The results were visibly improved after the changes were made."
Your question is itself a sentence which uses the word "could".
It is wondrous that she survives without visible means. Ultraviolet light is above the visible spectrum, hence the term.
The adverb form of the word "visible" is visibly.An example sentence is: "her friend was visibly upset about something".
A mixture with no visible components is homogenous
As they sailed on, there was a visible light at the horizon.
The lowlands are usually visible from the edge of the plateau