eternal - Meaning in Hindi

Meaning of eternal in Hindi

eternal nagging demands ( शाश्वत सता मांग )
fear of eternal damnation ( शाश्वत विनाश का भय )
I also keep lots of notes in notebooks, which to my eternal frustration have absolutely nothing to do with my plays. ( मैं नोटबुक में बहुत सारे नोट्स भी रखता हूं, जिनका मेरे नाटकों से कोई लेना-देना नहीं है। )
she is an eternal optimist ( वह एक शाश्वत आशावादी है )

Some people are very concerned about their eternal destiny.
The young girl wasn't allowed to have a pet dog, but she had an eternal craving for one.
These atoms, which are the seeds of all things, are, however, not eternal but created by God.
The arrival of digital sounds in music somehow reinforced the idea that media were eternal.
Reading takes me to eternal bliss where I don't know where the current is going to take me.
Wisdom comes with age, but some would rather have eternal youth.
to his eternal credit, he maintained his dignity throughout
the secret of eternal youth
eternal truths of art and life