cannot help but feel

を禁じ得ない means one cannot suppress a welling-up emotion. Attach it to a noun naming a feeling (anger, sympathy, surprise). It is formal and literary, used to convey a strong, involuntary emotional response.

Examples

• その光景こうけいに、涙なみだを禁きんじ得えなかった。

  Sono koukei ni, namida o kinjienakatta.

  At that sight, I could not hold back my tears.

• 彼かれの身勝手みがってな態度たいどには怒いかりを禁きんじ得えない。

  Kare no migatte na taido ni wa ikari o kinjienai.

  I can't help feeling anger at his selfish attitude.

Vocabulary in these examples

• その that (+ noun)
• 彼 he, him
• 身勝手 selfish
• 態度 attitude
• 怒り anger

Related patterns · Inevitability and compulsion

• 〜ずにはおかない will inevitably; won't leave it without
• 〜を余儀なくされる be forced to; have no choice but
• 〜てやまない can't stop; sincerely (do)
• 〜べく in order to
• 〜んがため in order to; for the sake of