Quick definitions from WordNet (sustain)
▸ verb: admit as valid ("The court sustained the motion")
▸ verb: supply with necessities and support ("She alone sustained her family")
▸ verb: lengthen or extend in duration or space ("We sustained the diplomatic negociations as long as possible")
▸ verb: undergo (as of injuries and illnesses)
▸ verb: establish or strengthen as with new evidence or facts
▸ verb: provide with nourishment ("We sustained ourselves on bread and water")
▸ verb: be the physical support of; carry the weight of
▸ Also see sustain
▸ verb: admit as valid ("The court sustained the motion")
▸ verb: supply with necessities and support ("She alone sustained her family")
▸ verb: lengthen or extend in duration or space ("We sustained the diplomatic negociations as long as possible")
▸ verb: undergo (as of injuries and illnesses)
▸ verb: establish or strengthen as with new evidence or facts
▸ verb: provide with nourishment ("We sustained ourselves on bread and water")
▸ verb: be the physical support of; carry the weight of
▸ Also see sustain