the main or most important failure

प्राथमिक विफलता

English Usage: The primary failure of the project was due to lack of funding.

Hindi Usage: परियोजना की प्राथमिक विफलता धन की कमी के कारण थी।

the state or condition of not meeting a desirable or intended objective

सफलता प्राप्त न कर पाना

English Usage: His failure to comply with the regulations led to severe penalties.

Hindi Usage: नियमों का पालन न कर पाने पर उसे गंभीर दंड का सामना करना पड़ा।