腦內啡 Save Sign in to save words Simplified: 脑内啡 nǎonèifēi ㄋㄠˇ ㄋㄟˋ ㄈㄟ endorphin Character by character 腦(nǎo)brain 內(nèi)inside 啡(fēi)(used in loanwords for its phonetic value) A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0