N1
に堪えない
にたえない
Cannot bear to, Cannot stand to, Too much to, Cannot go on doing, Cannot tolerate
この本には過激な表現がありすぎるので、読むに堪えない。
There are too many graphic expressions in this book that I can’t bear to read it.
Explanation
「に堪えない」 has 2 uses
1Too awful to bear
After 見る, 聞く, 読む or 正視: so bad you can't bear to watch, hear or read it. A strong criticism.
くりやまさんの歌声は酷すぎて聞くに堪えなかった。
Kuriyama-san's singing voice was so terrible that I couldn't bear to listen.
あの映画に出ている役者さんみんなが大根役者だったので、見るに堪えなかったです。
Since all the actors that were in that movie were bad actors, I couldn’t bear to watch it.
2Deeply (grateful)
After nouns of thanks or grief such as 感謝 or 痛惜: a formal way to say you feel it deeply.
皆様の温かいご支援に、感謝の念に堪えません。
I am deeply grateful for everyone's warm support.
恩師の突然の訃報に接し、痛惜の念に堪えない。
On hearing of my teacher's sudden death, I am filled with deep sorrow.