An example of ebb is when a wave moves out to sea.
When you were interested in learning about science but then you began to get bored and your interest lessened, this is a situation where your interest in science began to ebb.
An example of ebb is the movement of tide water out to the ocean or sea.
The ebb of faith.
The tides ebbed at noon.
Origin of ebb
- Middle English ebbe from Old English ebba apo- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition