नहीं कर पाया

couldn't do

→ नहीं
phrase Uncommon #4,544
couldn't do Expresses inability or failure to do something. The form changes with the subject; for example, नहीं कर पाई is used with a feminine subject.
HI: मैं समय पर काम पूरा नहीं कर पाया।
EN: I couldn't finish the work on time.

नहीं, मौका मिला, बताने की हिम्मत नहीं कर पाया मैं।

No, I had the chance, but I couldn't bring myself to tell you.

— 12th Fail (2023)

उस आदमी का जो खुद ही तुम्हारी रक्षा नहीं कर पाया?

That man who couldn’t even protect you himself?

— Lost Ladies (2024)

उसके बाद वो कभी आदमियों पर भरोसा ही नहीं कर पाया।

After that, he was never able to trust men again.

— Three of Us (2023)