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priceless

/ˈpɹaɪslɪs/ adjective

In Latin: impretiābilis Wiktionary

adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about priceless at Wordnik → Where our words come from →

  1. Having incalculable monetary, intellectual, or spiritual worth.

Origin

From price + -less (“lacking, without”).

From Wiktionary, via Kaikki.org (CC BY-SA)