SUSTAIN

I. transitive verb see: sub- Date: 13th century to give support or relief to, to supply with sustenance ; nourish , keep up , prolong , to support the weight of ; prop , to buoy up , 6. to bear up under, suffer , undergo , 7. to support as true, legal, or just, to allow or admit as valid , to support by adequate proof ; confirm , ~edly adverb ~er noun II. noun Date: 1972 a musical effect that prolongs a note's resonance