Not able to occur, exist, or be done

Extremely difficult or challenging

बेहद कठिन

English Usage: For some, running a marathon seems impossible.

Hindi Usage: कुछ लोगों के लिए मैराथन दौड़ना बेहद कठिन लगता है।

A situation that cannot happen or be done

Something that is very hard to achieve

कुछ ऐसा जो हासिल करना बहुत कठिन है

English Usage: Overcoming that challenge felt like an impossible.

Hindi Usage: उस चुनौती को पार करना एक असंभव जैसा लगा।