also: えこ
noun
unfairness; partiality; favoritism
Rare or archaic term for unfairness or bias. In modern Japanese, 不公平 or 依怙贔屓 (えこひいき) are more common. Often appears in the compound 依怙贔屓 (えこひいき).
「依估」は古い言葉で、今は「依怙贔屓」の形で使われることが多い。
依估 is an old word; nowadays it is often used in the form 依怙贔屓 (えこひいき).
The exact derivation is uncertain. The kanji 依 (rely on) and 估 (estimate, price) may have been used for their meanings related to biased judgment, but the word is likely an old Japanese term with ateji.