hi hữu

== Vietnamese == === Alternative forms === hy hữu === Etymology === Sino-Vietnamese word from 稀有. === Pronunciation === (Hà Nội) IPA(key): [hi˧˧ hiw˦ˀ˥] (Huế) IPA(key): [hɪj˧˧ hɨw˧˨] (Saigon) IPA(key): [hɪj˧˧ hɨw˨˩˦] === Adjective === hi hữu (of an occurrence) rare; uncommon