(literary) Buddhism; also used by Buddhists or Daoists to refer to their own scriptures and teachings

(literary) moral education and etiquette training provided to women within the inner chambers in ancient times; also written as 内训 nèi​xùn

(literary) the training of troops or practice of martial arts within the palace grounds

(literary) an expert or professional in a specific trade; same as 内行 nèi​háng