vail
vail1
(veɪl
) verb (transitive) obsolete
1 to lower (something, such as a weapon), esp as a sign of deference or submission
2 to remove (the hat, cap, etc) as a mark of respect or meekness
[c14 valen, from obsolete avalen, from Old French avaler to let fall, from Latin ad vallem, literally: to the valley, that is, down, from ad to + vallis valley]
