D defs.my
Entry 1 sense Webster, 1913

Estop

· Es·top · IPA /ɪˈstɒp/
01 v. t. To impede or bar by estoppel.
imp. & p. p. Estophed; p. pr. & vb. n. Estopping
  1. 1.
    To impede or bar by estoppel.(Law)
    “A party will be estopped by his admissions, where his intent is to influence another, or derive an advantage to himself.” — Abbott.