This is the 9613th most frequent Japanese word.
耐え難い
"Unbearable" or "intolerable."
In this sentence, '耐え難い' describes the difficulty of enduring someone's bad behavior, emphasizing emotional discomfort.
彼の失礼な態度は耐え難いです。
His rude attitude is intolerable.
Here, '耐え難い' characterizes intense physical pain associated with illness.'
この高熱は耐え難い苦痛を伴います。
This high fever comes with unbearable pain.
This sentence uses '耐え難い' to describe the challenging nature of required patience in situations of prolonged waiting.