Making something last longer or extending the duration of something beyond its normal time.
From Latin 'prolongare' combining 'pro-' (forward) and 'longus' (long). Entered English in the 15th century with legal and medical usage.
Doctors use 'prolonging life' as a phrase, but it raises a philosophical question—whether extending life is always kind, which is why 'do not resuscitate' orders are so important.
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