1. in a way that cannot be tolerated or borne; intolerably

Examples

• The heat in the desert was unendurably intense.
• She found his constant complaining unendurably annoying.
• The pain became unendurably severe after the medication wore off.
• The waiting room was unendurably crowded and stuffy.
• His arrogance made him unendurably difficult to work with.
• The noise from construction was unendurably loud all morning.