nghịch đảo

== Vietnamese == === Etymology === Sino-Vietnamese word from 逆倒, composed of 逆 (“opposite, against”) and 倒 (“to reverse, swap”). === Pronunciation === (Hà Nội) IPA(key): [ŋïk̟̚˧˨ʔ ʔɗaːw˧˩] (Huế) IPA(key): [ŋɨt̚˨˩ʔ ʔɗaːw˧˨] (Saigon) IPA(key): [ŋɨt̚˨˩˨ ʔɗaːw˨˩˦] === Adjective === nghịch đảo • (逆倒) (mathematics) inverse, reciprocal === Noun === nghịch đảo • (逆倒) (mathematics) (multiplicative) inverse, reciprocal === Further reading === “nghịch đảo”, in Soha Tra Từ (in Vietnamese), Hanoi: Vietnam Communications Corporation.