ESTOPPEL n.
A stop; an obstruction or bar to one's alleging or denying a fact contrary to his own previous action, allegation, or denial; an admission, by words or conduct, which induces another to purchase rights, against which the party making such admission can not take a position inconsistent with the admission.…
GLIDE n.
The act or manner of moving smoothly, swiftly, and without labor or obstruction. They prey at last ensnared, he dreadful darts, With rapid glide, along the leaning line. Thomson. Seeing Orlando, it unlink'd itself, And with indented glides did slip away. Shak.