Nantoka/内啡素nèi fēi sùTraditional: 內啡素内啡素 (nèi fēi sù) is a Chinese word meaning “endorphin”.Meanings1endorphinCharacters in 内啡素内nèi · inside啡fēi · (used in loanwords for its phonetic value)素sù · raw silkRelated words内inside咖啡(loanword) coffee内心heart; innermost being内容content; substance; details之内inside; within内部interior内裤underpants体内within the body素raw silk内衣undergarment内疚guilty conscience因素elementStudy Chinese with flashcards →