秘ひ密みつ保ほ持じ契けい約やくMeaningsNoun1. non-disclosure agreement; NDAKanji used秘secret密intimate保preserve持have契pledge約promiseComposed of秘ひ密みつsecret; secrecy; confidentiality; privacy; mystery; secret (e.g. to success); esoteric teachingsNoun保ほ持じretention; maintenance; preservationNoun契けい約やくcontract; compact; agreementNoun