decaffeinationWiktionary 原文英/diːˌkæfiːˈneɪʃən/美构词拆解dede-前缀caffeincaffeine词干ation-ation后缀de-reversal, undoing · to remove from, removed-ationAn action or process. · The result of an action or process.词源说明From de- + caffeine + -ation.释义名词noun1The removal of caffeine.