1. (imp. & p. p.) of Sustain.

2. (a.) Held up to a certain pitch, degree, or level; uniform; as, sustained passion; a sustained style of writing; a sustained note in music.

abiding based on bolstered borne braced buttressed ceaseless changeless chattering constant continual continued continuing continuous durable enduring even firm fixed founded on frozen grounded on guyed held immobile immutable incessant indefatigable intact interminable inviolate lasting level machine gun maintained oscillating perennial permanent perpetual persistent prolonged propped pulsating quiescent rapid regular remaining repeated rigid shored up solid stable staccato static stationary stayed staying steadfast steady sticking stuttering supported torpid unaltered unbroken unceasing unchangeable unchanged unchanging unchecked undestroyed undying unfading unfailing uniform unintermitted unintermittent unintermitting uninterrupted unremitting unshifting unstopped unvaried unvarying upheld vibrating