Infallible

"Infallible" in Japanese

全い

mattai

(without fault or weakness; incapable of error or fallacy)

完璧な

kampeki na

(without fault or weakness; incapable of error or fallacy)

無欠の

muketsu no

(without fault or weakness; incapable of error or fallacy)

無謬の

mubyū no

(without fault or weakness; incapable of error or fallacy)

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.