To maintain, or keep in existence.
The professor had trouble sustaining students’ interest until the end of her lectures.
To encourage or sanction (something).
A mechanism which can be used to hold a note, as the right pedal on a piano.
To call this music bland is to ignore the down-the-drain vocal fade-aways, the extended sax sustains […]
From Middle English susteinen, sustenen, from Old French sustenir (French soutenir), from Latin sustineō, sustinēre (“to uphold”), from sub- (“from below, up”) + teneō (“hold”, verb).
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