sostenuto

• POS: Adjective, Adverb
• HYPHEN: sos=te=nu=to

CIDE DICTIONARY

sostenuto, a. [It.].

 Sustained; -- applied to a movement or passage the sounds of which are to sustained to the utmost of the nominal value of the time; also, to a passage the tones of which are to be somewhat prolonged or protacted.  [1913 Webster]

OXFORD DICTIONARY

sostenuto, adv., adj., & n. Mus.
--adv. & adj. in a sustained or prolonged manner.
--n. (pl. -os) a passage to be played in this way.

Etymology

It., past part. of sostenere SUSTAIN