Die away - Become quieter or inaudible (of a sound) (शिथिल बन जाना/ कमजोर बनना)
The last notes DIED AWAY and the audience burst into applause.
Die down - Decrease or become quieter (शांत हो जाना)
It was on the front pages of all the papers for a few days, but the interest gradually DIED DOWN.
Die for - Want something a lot (कुछ ज्यादा चाहना) 
I’m DYING FOR the weekend- this week’s been so hard.
Die off - Become extinct (विलुप्त होना/ समाप्त हो जाना) 
The veterans of World War II are now old and gradually DYING OFF. 
Die out - Become extinct or disappear (गायब होना) 
Some scientists say that the dinosaurs DIED OUT when a comet hit the earth and caused a nuclear winter