Difficult or impossible to endure; intolerable.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "insufferable" in a sentence
"I'm not sure the term insufferable boor is quite adequate here, I'm not saying that he's entirely without humor, but it's the sort of humor that is always tempered by a reminder of how much money he has and how he is holding it over his adult children."
"If we adhere to a standard of misery and continue to compare our suffering, then we will remain insufferable."
"I grant that the manners of the Fins to the Russians are described as insufferable both by the Swedes and the Russians, and that we never listened to the Russian side of that story."