Answer:
The word would be: Wistful
Explanation:
Wistful: having or showing a feeling of vague or regretful longing.
I hope this helps you!
In a way that cannot be controlled
The correct answer is "etymology".
It is the science of word origin and how they changed over the years. Not only in form, but also in meaning.
This should be in the Mathematics section, but...
1/2+1/5
=5/10+2/10
=7/10