present participle of sustain

The process by which something is sustained or upheld.

That sustains, supports or provides sustenance.

plural of sustaining

(transitive) To maintain, or keep in existence. / (transitive) To provide for or nourish. / (transitive) To encourage or sanction (something). / (transitive) To experience or suffer (an injury, etc.).

(music) A mechanism which can be used to hold a note, as the right pedal on a piano.

Able to be sustained. / Able to be produced or sustained for an indefinite period without damaging the environment, or without depleting a resource; renewable.

A renewable energy source.

simple past tense and past participle of sustain

Held continuously at a certain level. / (music) Held at a certain pitch.