Choose the word that can substitute the given group of words.

That can be seen through

Transparent 

The word that can substitute the given group of words "that can be seen through" is transparent.

• Defatigable means not easily tired.
• Opaque means not transparent; not allowing light to pass through.
• Reverent means showing deep respect.

A transparent object is one that allows light to pass through it so that objects behind it can be seen. For example, a window is transparent.