noun
estoppel
Legal term for a principle that prevents a person from asserting something contrary to what is implied by a previous action or statement. Also referred to as 禁反言 (きんはんげん).
See also: 禁反言
エストッペルの法理により、その主張は認められなかった。
Under the doctrine of estoppel, that claim was not accepted.
Synonymous legal term; 禁反言 is the kanji-based Japanese equivalent, while エストッペル is the direct loanword from English.
Borrowed from English 'estoppel', a legal term.