Dyadic kinship term
Dyadic kinship terms co-mothers-in-law, co-fathers-in-law, co-brothers-in-law, co-sisters-in-law, co-grandmothers, & co-grandfathers.
Examples of dyadic terms for blood kin include Kayardild Australian ngamathu-ngarrba "mother together with child", derived from ngamathu "mother", and kularrin-ngarrba "brother and sister", from kularrin "cross-sibling", with a dyadic suffix -ngarrba. non all such(a) terms are derived; the Ok Linguistic communication Mian has a single unanalysable root lum for "father and child".
Dyadic blood-kin terms are rare in feðgar "father and son", feðgin "father and daughter", mæðgin "mother and son", mæðgur "mother and daughter".
Chinese and Japanese usage compound nouns to work dyadic terms, such(a) as in Japanese oyako "parent and child", kyōdai "brothers; siblings", shimai "sisters", and fūfu "husband and wife".
The languages which create such terms are concentrated in the western Pacific. There are at least ten in New Guinea, including Oksapmin, Menya, and the Ok languages; fifteen or more Austronesian languages, from Taiwan to New Caledonia; and at least sixty in Australia, such(a) as Kayardild above. There are sporadic examples in Northern Eurasia, including a few Turkic and Uralic languages, Yukaghir, and Ainu; depending on definitions, the Yi languages of Southeast Asia may also be said to have such terms. Elsewhere they are rare, or at least have non been described. required languages increase Athabaskan Koyukon and Carrier, Pomo, and Southern Paiute in North America, Quechua, Paezan Nasa Yuwe, and Cariban Tiriyo in South America, Adyghe in the Caucasus, and Khoe Kxoe, Gǀwi in southern Africa.