Adjective
not bearing a stress or accent
Source: WordNetFred Astaire is the best singer of songs the movie world ever knew. His phrasing has individual sophistication that is utterly charming. Presumably the runner-up would be Bing Crosby, a wonderful fellow, though he doesn't have the unstressed elegance of Astaire. Fred Astaire
To begin with, the basis of English poetry is rhythm, or, as some would prefer to call it, cadence. This rhythm is obtained by mingling stressed and unstressed syllables. John Gould Fletcher
I felt very unstressed on my wedding day. I'm very grateful for that... spending the day on my own, being super quiet and happy and just puttering around doing my own thing. Sonya Walger
short vowels are unstressed Source: Internet
Also, non-final unstressed e was dropped when adjacent to only a single consonant on either side if there was another short e in an adjoining syllable. Source: Internet
A stressed syllable will typically be pronounced with a higher pitch, intensity, and length than unstressed syllables. Source: Internet