Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They describe how, when, where, or to what extent something happens.
* "Hydr" is related to water. It wouldn't make sense to directly use it to modify actions or qualities in the way adverbs do.
Examples of "hydr" in use:
* Hydrant: A pipe for supplying water.
* Hydraulic: Relating to the use of liquids in motion to transmit power.
* Dehydrate: To lose water.
To form adverbs, we usually use suffixes like:
* -ly: quickly, slowly, easily
* -ward: backward, forward, upward
* -wise: clockwise, otherwise, lengthwise
If you're looking for adverbs related to water, you might consider words like:
* Aquatically
* Submergedly
* Streamwise
* Oceanically
These words are formed using different roots and suffixes related to water and movement.