A sharp edge of a knife or similar object.

चाकू की धार

English Usage: The knife-edged blade cut through the paper easily.

Hindi Usage: चाकू की धार ने कागज को आसानी से काट दिया।

Extremely sharp or finely cut; also used to describe something that is very close to a decision point.

अत्यधिक तेज़ या बारीक; निर्णय बिंदु के बहुत करीब

English Usage: The competition was knife-edged, with both teams performing exceptionally well.

Hindi Usage: प्रतियोगिता चाकू की धार पर थी, दोनों टीमों ने बेहद अच्छा प्रदर्शन किया।