the mind > language > linguistics > study of speech sound > speech sound > intonation, pitch, or stress > [noun] > accent > stress accent > lack of stress (5)
Unaccented or unemphasized state or condition. Also figurative.
the quality or state of being stressless.
(un-, prefix1 affix 6. Cf. unstressed, adj.)
Absence of stress; the pronunciation of a syllable, etc., without stress.