simple past tense and past participle of sustain
simple past tense and past participle of overrule
Held continuously at a certain level.
(music) Held at a certain pitch.
Held up to a certain pitch, degree, or level; uniform; as, sustained pasion; a sustained style of writing; a sustained note in music.
maintained at length without interruption or weakening;
(of an electric arc) continuous;
‘heat transfer to the anode in free burning arcs’;