unendurably
/ˌʌnɪnˈdʊrəbli/
adverb
- In a way that is impossible to bear or tolerate because of being too painful, difficult, or extreme.
- The heat in the desert was unendurably intense, forcing the hikers to stop.
- The noise from the construction site became unendurably loud after noon.
- She found the wait for news unendurably long and stressful.