As an adverb atwo
is in two; in twain; asunder.
As a verb atgo is
to expend; go; pass away; vanish.
atwo
English
Adverb
(
-)
(obsolete) In two; in twain; asunder.
- (Chaucer)
(
Webster 1913)
atgo
English
Verb
To expend; go; pass away; vanish.
References
* Wright, Dictionary of obsolete and provincial English , atgo.