strengthen or support physically or mentally.
“this thought had sustained him throughout the years”
synonyms: comfort, help, assist, encourage,succor, support, give strength to,buoy up, carry, cheer up, hearten;
“her memories sustained her”
undergo or suffer (something unpleasant, especially an injury).
“he died after sustaining severe head injuries”
synonyms: undergo, experience, suffer, endure
“she sustained slight injuries”
an effect or facility on a keyboard or electronic instrument whereby a note can be sustained after the key is released.