quy tắc

== Vietnamese == === Etymology === Sino-Vietnamese, Japanese 規則 (kisoku), Middle Chinese 規則. === Pronunciation === (Hà Nội) IPA(key): [kwi˧˧ tak̚˧˦] (Huế) IPA(key): [kwɪj˧˧ tak̚˦˧˥] (Saigon) IPA(key): [wɪj˧˧ tak̚˦˥] === Noun === quy tắc a rule (especially a rule of thumb), a code or a principle