Kakeahi

...A word that is used intentionally in another place as a word that is somehow related in meaning to another word in waka or writing. "En" means connection, that is, some kind of relationship, and related words are also called "yose" or "kakeahi." For example, in the waka poem "Wagasekoga koromo no hem wo fuu ga urame rashi ki aki no atsu kaze" ("The first wind of autumn blows back the hem of wagasekoga koromo" ("Kokinshu")), "ura" in the fourth line is a word that is related to "koromo" in the second line, that is, a related word.

*Some of the terminology explanations that refer to "kakeahi" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…和歌･文章で一つの語と意味上で何らかの関係がある語として，意識的に他の個所で用いられた語。〈縁〉とはゆかり，すなわち何らかの関係の意で，縁語は〈よせ〉〈かけあひ〉ともいう。たとえば〈わがせこが衣のすそを吹き返しうらめづらしき秋の初風〉(《古今集》)の和歌で，4句目の〈うら〉が2句目の〈衣〉に縁のある語すなわち縁語である。…

※「かけあひ」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報