Anorexics ignore that sustained emaciation ends in starvation.
The songs built slowly with anger, ache, tearfulness and fury, with sustained notes and cascading melismas.
In the nineteenth century, the sustained metaphors of sf—non-mimetic fiction—were reconceived with the aid of science, the same science that Arthur Miller quails before today.
Meaning of sustain for the defined word.
Grammatically, this word "sustain" is a noun, more specifically, a countable noun. It's also a verb, more specifically, a transitive verb.