Only two of the printed lines actually show this ending: the sign reading 'do not touch' and the flat 'no' at the start of another line, both of which use it as an archaic, stiff, proclamation-style form. The rest are the syllable turning up elsewhere — the exclamation 'oh', a character's name, and pieces of other words — which look identical but are not this ending at all. There is not enough here to describe how it behaves as a connective, so treat this entry as partial.
Register: archaic when it is the ending
The examples below did not fully pin this one down — read them before relying on the entry above.