Wanion,
n. [Probably for OE.
waniand waning, p. pr. of
wanien; hence, used of the waning of the moon, supposed to be an unlucky time. See
Wane.].
A word of uncertain signification, used only in the phrase with a wanion, apparently equivalent to with a vengeance, with a plague, or with misfortune. B. Jonson. Latimer. [1913 Webster]