不ふ動どう産さん担たん保ぽ証しょう券けんMeaningsNoun1. mortgage-backed securityKanji used不negative動move産give birth担to shoulder保preserve証proof券ticketComposed of不ふ動どう産さんreal estateNoun担たん保ぽsecurity; guarantee; collateral; mortgage; guarantee (e.g. of safety)Noun証しょう券けんbond; bill; certificate; securityNoun