Talk so much that you sound hoarse (3)
I believe the answer is:
nag
This could be a double definition.
'talk' is the first definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'much that you sound hoarse' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'so' acts as a link.
Can you help me to learn more?
(Other definitions for nag that I've seen before include "Be persistently painful" , "Complain, worry" , "trouble constantly" , "Complain continuously like old horse" , "Scold; inferior horse" .)