hiếm khi

== Vietnamese == === Etymology === hiếm (“rare”) +‎ khi (“when”). === Pronunciation === (Hà Nội) IPA(key): [hiəm˧˦ xi˧˧] (Huế) IPA(key): [hiəm˦˧˥ kʰɪj˧˧] (Saigon) IPA(key): [him˦˥ kʰɪj˧˧] === Adverb === hiếm khi rarely; seldom