prodigal 2 antonyms and opposites of prodigal. Adjective — Spending money or resources wastefully and extravagantly. Synonyms for prodigal extravagant improvident imprudent lavish loose-handed profligate reckless spendthrift squandering uneconomical unthrifty wasteful Antonyms for prodigal frugal stingy ← Back to the full definition of prodigal