Superlative form of sore: most sore. Most sore.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "sorest" in a sentence
"I think, of all the crushing griefs that a young person can be called to bear, one of the sorest is the feeling of wrong-doing on the part of a beloved father or mother."
"He criticised it for not containing a single step to solve what he called the sorest problems of the judiciary, SITA reported."
"The IPO market might be accommodating for the cream of the crop, but not to those in sorest need of [...]"