To survive solely by consuming a certain thing.(verb)
To endure.(verb)
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Use "live on" in a sentence
"Patients who bravely face the danger and the difficulties usually live on much longer and sometimes live their lives out, and in spite of serious invasion of the lungs die from other intercurrent disease."
"He and India live on the Delaware Bay with their daughter, Corri."
"All games on Friday and Saturday will be video-streamed live on theACC. com."